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position","\u002Fsnt-2nde\u002Fse-localisation-cartographie\u002Fconfidentialite-position","0.snt-2nde\u002Fse-localisation-cartographie\u002F5.confidentialite-position",{"title":145,"path":146,"stem":147,"children":148},"Informatique embarquée et objets connectés","\u002Fsnt-2nde\u002Fsf-info-embarquee","0.snt-2nde\u002Fsf-info-embarquee\u002F0.index",[149,150,154,158],{"title":145,"path":146,"stem":147},{"title":151,"path":152,"stem":153},"Systèmes informatiques embarqués","\u002Fsnt-2nde\u002Fsf-info-embarquee\u002Fsystemes-embarques","0.snt-2nde\u002Fsf-info-embarquee\u002F1.systemes-embarques",{"title":155,"path":156,"stem":157},"Capteurs et actionneurs","\u002Fsnt-2nde\u002Fsf-info-embarquee\u002Fcapteurs-actionneurs","0.snt-2nde\u002Fsf-info-embarquee\u002F2.capteurs-actionneurs",{"title":159,"path":160,"stem":161},"IHM et objets connectés","\u002Fsnt-2nde\u002Fsf-info-embarquee\u002Fihm-objet-connecte","0.snt-2nde\u002Fsf-info-embarquee\u002F3.ihm-objet-connecte",{"title":163,"path":164,"stem":165,"children":166},"Photographie numérique","\u002Fsnt-2nde\u002Fsg-photo-numerique","0.snt-2nde\u002Fsg-photo-numerique\u002F0.index",[167,168,172,176,180],{"title":163,"path":164,"stem":165},{"title":169,"path":170,"stem":171},"Photosites, pixels et résolution","\u002Fsnt-2nde\u002Fsg-photo-numerique\u002Fpixels-resolution","0.snt-2nde\u002Fsg-photo-numerique\u002F1.pixels-resolution",{"title":173,"path":174,"stem":175},"Les algorithmes de l'appareil photo","\u002Fsnt-2nde\u002Fsg-photo-numerique\u002Falgorithmes-photo","0.snt-2nde\u002Fsg-photo-numerique\u002F2.algorithmes-photo",{"title":177,"path":178,"stem":179},"Les métadonnées EXIF","\u002Fsnt-2nde\u002Fsg-photo-numerique\u002Fmetadonnees-exif","0.snt-2nde\u002Fsg-photo-numerique\u002F3.metadonnees-exif",{"title":181,"path":182,"stem":183},"Traiter une image en Python","\u002Fsnt-2nde\u002Fsg-photo-numerique\u002Ftraitement-rgb","0.snt-2nde\u002Fsg-photo-numerique\u002F4.traitement-rgb",{"title":185,"path":186,"stem":187,"children":188},"Notions transversales de programmation","\u002Fsnt-2nde\u002Fsh-prog-notions","0.snt-2nde\u002Fsh-prog-notions\u002F0.index",[189,190,194,198,202],{"title":185,"path":186,"stem":187},{"title":191,"path":192,"stem":193},"Séquences d'instructions et variables","\u002Fsnt-2nde\u002Fsh-prog-notions\u002Fsequences-affectations","0.snt-2nde\u002Fsh-prog-notions\u002F1.sequences-affectations",{"title":195,"path":196,"stem":197},"Instructions conditionnelles","\u002Fsnt-2nde\u002Fsh-prog-notions\u002Fconditionnelles","0.snt-2nde\u002Fsh-prog-notions\u002F2.conditionnelles",{"title":199,"path":200,"stem":201},"Boucles bornées et non bornées","\u002Fsnt-2nde\u002Fsh-prog-notions\u002Fboucles","0.snt-2nde\u002Fsh-prog-notions\u002F3.boucles",{"title":203,"path":204,"stem":205},"Définitions et appels de fonctions","\u002Fsnt-2nde\u002Fsh-prog-notions\u002Ffonctions","0.snt-2nde\u002Fsh-prog-notions\u002F4.fonctions",{"title":207,"path":208,"stem":209,"children":210},"Démo des widgets MDC","\u002Fsnt-2nde\u002Fzz-demo-widgets","0.snt-2nde\u002Fzz-demo-widgets\u002F0.index",[211,212,216,220],{"title":207,"path":208,"stem":209},{"title":213,"path":214,"stem":215},"Démo statique — callouts, code, BO, illustration","\u002Fsnt-2nde\u002Fzz-demo-widgets\u002Fstatique","0.snt-2nde\u002Fzz-demo-widgets\u002F1.statique",{"title":217,"path":218,"stem":219},"Démo interactive — self-eval et python-snippet","\u002Fsnt-2nde\u002Fzz-demo-widgets\u002Finteractif","0.snt-2nde\u002Fzz-demo-widgets\u002F2.interactif",{"title":221,"path":222,"stem":223},"Démo · 14 widgets de manipulation NSI","\u002Fsnt-2nde\u002Fzz-demo-widgets\u002Fwidgets-manipulation","0.snt-2nde\u002Fzz-demo-widgets\u002F3.widgets-manipulation",{"title":225,"path":226,"stem":227,"children":228},"NSI — 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deux","\u002Fnsi-1ere\u002Fpb-types-valeurs\u002Fentiers-relatifs","1.nsi-1ere\u002Fpb-types-valeurs\u002F2.entiers-relatifs",{"title":271,"path":272,"stem":273},"Nombres flottants et virgule flottante","\u002Fnsi-1ere\u002Fpb-types-valeurs\u002Fflottants","1.nsi-1ere\u002Fpb-types-valeurs\u002F3.flottants",{"title":275,"path":276,"stem":277},"Textes et encodages — ASCII, ISO-8859-1, Unicode","\u002Fnsi-1ere\u002Fpb-types-valeurs\u002Ftextes-encodages","1.nsi-1ere\u002Fpb-types-valeurs\u002F4.textes-encodages",{"title":279,"path":280,"stem":281},"Valeurs booléennes et opérateurs logiques","\u002Fnsi-1ere\u002Fpb-types-valeurs\u002Fbooleens","1.nsi-1ere\u002Fpb-types-valeurs\u002F5.booleens",{"title":283,"path":284,"stem":285,"children":286},"Représentation des données : types construits","\u002Fnsi-1ere\u002Fpc-types-construits","1.nsi-1ere\u002Fpc-types-construits\u002F0.index",[287,288,292,296,300],{"title":283,"path":284,"stem":285},{"title":289,"path":290,"stem":291},"Tableaux et listes","\u002Fnsi-1ere\u002Fpc-types-construits\u002Ftableaux-listes","1.nsi-1ere\u002Fpc-types-construits\u002F1.tableaux-listes",{"title":293,"path":294,"stem":295},"Listes en compréhension","\u002Fnsi-1ere\u002Fpc-types-construits\u002Fcomprehension","1.nsi-1ere\u002Fpc-types-construits\u002F2.comprehension",{"title":297,"path":298,"stem":299},"Tuples et p-uplets nommés","\u002Fnsi-1ere\u002Fpc-types-construits\u002Ftuples","1.nsi-1ere\u002Fpc-types-construits\u002F3.tuples",{"title":301,"path":302,"stem":303},"Dictionnaires","\u002Fnsi-1ere\u002Fpc-types-construits\u002Fdictionnaires","1.nsi-1ere\u002Fpc-types-construits\u002F4.dictionnaires",{"title":305,"path":306,"stem":307,"children":308},"Traitement de données en tables","\u002Fnsi-1ere\u002Fpd-tables-donnees","1.nsi-1ere\u002Fpd-tables-donnees\u002F0.index",[309,310,314,318,322],{"title":305,"path":306,"stem":307},{"title":311,"path":312,"stem":313},"Tables et CSV","\u002Fnsi-1ere\u002Fpd-tables-donnees\u002Ftables-csv","1.nsi-1ere\u002Fpd-tables-donnees\u002F1.tables-csv",{"title":315,"path":316,"stem":317},"Recherche et filtrage","\u002Fnsi-1ere\u002Fpd-tables-donnees\u002Frecherche","1.nsi-1ere\u002Fpd-tables-donnees\u002F2.recherche",{"title":319,"path":320,"stem":321},"Trier une table","\u002Fnsi-1ere\u002Fpd-tables-donnees\u002Ftri","1.nsi-1ere\u002Fpd-tables-donnees\u002F3.tri",{"title":323,"path":324,"stem":325,"children":326},"Fusion et indexation","\u002Fnsi-1ere\u002Fpd-tables-donnees\u002Ffusion-indexation","1.nsi-1ere\u002Fpd-tables-donnees\u002F4.fusion-indexation",[327],{"title":323,"path":324,"stem":325},{"title":329,"path":330,"stem":331,"children":332},"IHM sur le Web","\u002Fnsi-1ere\u002Fpe-ihm-web","1.nsi-1ere\u002Fpe-ihm-web\u002F0.index",[333,334,338,342,346,350],{"title":329,"path":330,"stem":331},{"title":335,"path":336,"stem":337},"HTML et CSS — rappel de structure","\u002Fnsi-1ere\u002Fpe-ihm-web\u002Fhtml-css-bases","1.nsi-1ere\u002Fpe-ihm-web\u002F1.html-css-bases",{"title":339,"path":340,"stem":341},"Formulaires HTML","\u002Fnsi-1ere\u002Fpe-ihm-web\u002Fformulaires","1.nsi-1ere\u002Fpe-ihm-web\u002F2.formulaires",{"title":343,"path":344,"stem":345},"Événements JavaScript","\u002Fnsi-1ere\u002Fpe-ihm-web\u002Fevenements-js","1.nsi-1ere\u002Fpe-ihm-web\u002F3.evenements-js",{"title":347,"path":348,"stem":349},"Manipulation du DOM","\u002Fnsi-1ere\u002Fpe-ihm-web\u002Fdom-interaction","1.nsi-1ere\u002Fpe-ihm-web\u002F4.dom-interaction",{"title":351,"path":352,"stem":353},"Client, serveur et HTTP","\u002Fnsi-1ere\u002Fpe-ihm-web\u002Fclient-serveur-http","1.nsi-1ere\u002Fpe-ihm-web\u002F5.client-serveur-http",{"title":355,"path":356,"stem":357,"children":358},"Architectures matérielles et systèmes d'exploitation","\u002Fnsi-1ere\u002Fpf-archi-os","1.nsi-1ere\u002Fpf-archi-os\u002F0.index",[359,360,364,368,372,376],{"title":355,"path":356,"stem":357},{"title":361,"path":362,"stem":363},"Le modèle de von Neumann","\u002Fnsi-1ere\u002Fpf-archi-os\u002Fvon-neumann","1.nsi-1ere\u002Fpf-archi-os\u002F1.von-neumann",{"title":365,"path":366,"stem":367},"Périphériques et interface homme-machine","\u002Fnsi-1ere\u002Fpf-archi-os\u002Fperipheriques-ihm","1.nsi-1ere\u002Fpf-archi-os\u002F2.peripheriques-ihm",{"title":369,"path":370,"stem":371},"Les systèmes d'exploitation","\u002Fnsi-1ere\u002Fpf-archi-os\u002Fsystemes-exploitation","1.nsi-1ere\u002Fpf-archi-os\u002F3.systemes-exploitation",{"title":373,"path":374,"stem":375},"Linux et le shell","\u002Fnsi-1ere\u002Fpf-archi-os\u002Flinux-shell","1.nsi-1ere\u002Fpf-archi-os\u002F4.linux-shell",{"title":377,"path":378,"stem":379},"Réseaux et protocoles","\u002Fnsi-1ere\u002Fpf-archi-os\u002Freseaux","1.nsi-1ere\u002Fpf-archi-os\u002F5.reseaux",{"title":381,"path":382,"stem":383,"children":384},"Langages et programmation","\u002Fnsi-1ere\u002Fpg-langages-prog","1.nsi-1ere\u002Fpg-langages-prog\u002F0.index",[385,386,390,394,398,402,406],{"title":381,"path":382,"stem":383},{"title":387,"path":388,"stem":389},"Diversité et unité des langages de programmation","\u002Fnsi-1ere\u002Fpg-langages-prog\u002Fdiversite-langages","1.nsi-1ere\u002Fpg-langages-prog\u002F1.diversite-langages",{"title":391,"path":392,"stem":393},"Constructions élémentaires","\u002Fnsi-1ere\u002Fpg-langages-prog\u002Fconstructions-elementaires","1.nsi-1ere\u002Fpg-langages-prog\u002F2.constructions-elementaires",{"title":395,"path":396,"stem":397},"Fonctions","\u002Fnsi-1ere\u002Fpg-langages-prog\u002Ffonctions","1.nsi-1ere\u002Fpg-langages-prog\u002F3.fonctions",{"title":399,"path":400,"stem":401},"Spécification d'une fonction","\u002Fnsi-1ere\u002Fpg-langages-prog\u002Fspecification","1.nsi-1ere\u002Fpg-langages-prog\u002F4.specification",{"title":403,"path":404,"stem":405},"Mise au point des programmes","\u002Fnsi-1ere\u002Fpg-langages-prog\u002Fmise-au-point","1.nsi-1ere\u002Fpg-langages-prog\u002F5.mise-au-point",{"title":407,"path":408,"stem":409},"Utilisation de bibliothèques","\u002Fnsi-1ere\u002Fpg-langages-prog\u002Fbibliotheques","1.nsi-1ere\u002Fpg-langages-prog\u002F6.bibliotheques",{"title":411,"path":412,"stem":413,"children":414},"Algorithmique","\u002Fnsi-1ere\u002Fph-algorithmique","1.nsi-1ere\u002Fph-algorithmique\u002F0.index",[415,416,420,424,428,432,436],{"title":411,"path":412,"stem":413},{"title":417,"path":418,"stem":419},"Parcours séquentiel d'un tableau","\u002Fnsi-1ere\u002Fph-algorithmique\u002Fparcours-sequentiel","1.nsi-1ere\u002Fph-algorithmique\u002F1.parcours-sequentiel",{"title":421,"path":422,"stem":423},"Bases de la complexité","\u002Fnsi-1ere\u002Fph-algorithmique\u002Fcomplexite-bases","1.nsi-1ere\u002Fph-algorithmique\u002F2.complexite-bases",{"title":425,"path":426,"stem":427},"Tris par sélection et par insertion","\u002Fnsi-1ere\u002Fph-algorithmique\u002Ftris","1.nsi-1ere\u002Fph-algorithmique\u002F3.tris",{"title":429,"path":430,"stem":431},"Recherche dichotomique","\u002Fnsi-1ere\u002Fph-algorithmique\u002Fdichotomie","1.nsi-1ere\u002Fph-algorithmique\u002F4.dichotomie",{"title":433,"path":434,"stem":435},"Algorithmes gloutons","\u002Fnsi-1ere\u002Fph-algorithmique\u002Fgloutons","1.nsi-1ere\u002Fph-algorithmique\u002F5.gloutons",{"title":437,"path":438,"stem":439},"Les k plus proches voisins (k-NN)","\u002Fnsi-1ere\u002Fph-algorithmique\u002Fknn","1.nsi-1ere\u002Fph-algorithmique\u002F6.knn",{"title":441,"path":442,"stem":443,"children":444},"NSI — Terminale","\u002Fnsi-tale","2.nsi-tale\u002F0.index",[445,446,450,476,498,536,560],{"title":441,"path":442,"stem":443},{"title":447,"path":448,"stem":449},"Review pédagogique — chapitres NSI Terminale (TA, TB, TC, TD, TE)","\u002Fnsi-tale\u002Freview","2.nsi-tale\u002FREVIEW",{"title":451,"path":452,"stem":453,"children":454},"Structures de données","\u002Fnsi-tale\u002Fta-structures-donnees","2.nsi-tale\u002Fta-structures-donnees\u002F0.index",[455,456,460,464,468,472],{"title":451,"path":452,"stem":453},{"title":457,"path":458,"stem":459},"Objet, classe, interface","\u002Fnsi-tale\u002Fta-structures-donnees\u002Finterface-implementation","2.nsi-tale\u002Fta-structures-donnees\u002F1.interface-implementation",{"title":461,"path":462,"stem":463},"Implémenter une structure — l'exemple de la file FIFO","\u002Fnsi-tale\u002Fta-structures-donnees\u002Fimplementer-une-structure","2.nsi-tale\u002Fta-structures-donnees\u002F2.implementer-une-structure",{"title":465,"path":466,"stem":467},"Listes, piles, files, dictionnaires","\u002Fnsi-tale\u002Fta-structures-donnees\u002Flistes-piles-files-dict","2.nsi-tale\u002Fta-structures-donnees\u002F3.listes-piles-files-dict",{"title":469,"path":470,"stem":471},"Arbres binaires","\u002Fnsi-tale\u002Fta-structures-donnees\u002Farbres-binaires","2.nsi-tale\u002Fta-structures-donnees\u002F4.arbres-binaires",{"title":473,"path":474,"stem":475},"Graphes","\u002Fnsi-tale\u002Fta-structures-donnees\u002Fgraphes","2.nsi-tale\u002Fta-structures-donnees\u002F5.graphes",{"title":477,"path":478,"stem":479,"children":480},"Bases de données","\u002Fnsi-tale\u002Ftb-bases-de-donnees","2.nsi-tale\u002Ftb-bases-de-donnees\u002F0.index",[481,482,486,490,494],{"title":477,"path":478,"stem":479},{"title":483,"path":484,"stem":485},"Le modèle relationnel","\u002Fnsi-tale\u002Ftb-bases-de-donnees\u002Fmodele-relationnel","2.nsi-tale\u002Ftb-bases-de-donnees\u002F1.modele-relationnel",{"title":487,"path":488,"stem":489},"Bases de données relationnelles et anomalies de schéma","\u002Fnsi-tale\u002Ftb-bases-de-donnees\u002Fbase-relationnelle","2.nsi-tale\u002Ftb-bases-de-donnees\u002F2.base-relationnelle",{"title":491,"path":492,"stem":493},"Le langage SQL","\u002Fnsi-tale\u002Ftb-bases-de-donnees\u002Fsql","2.nsi-tale\u002Ftb-bases-de-donnees\u002F3.sql",{"title":495,"path":496,"stem":497},"Les systèmes de gestion de bases de données","\u002Fnsi-tale\u002Ftb-bases-de-donnees\u002Fsgbd","2.nsi-tale\u002Ftb-bases-de-donnees\u002F4.sgbd",{"title":499,"path":500,"stem":501,"children":502},"Architectures matérielles, systèmes d'exploitation et réseaux","\u002Fnsi-tale\u002Ftc-archi-os-reseaux","2.nsi-tale\u002Ftc-archi-os-reseaux\u002F0.index",[503,504,508,512,516,520,524,528,532],{"title":499,"path":500,"stem":501},{"title":505,"path":506,"stem":507},"Le système sur puce (SoC)","\u002Fnsi-tale\u002Ftc-archi-os-reseaux\u002Fsysteme-sur-puce","2.nsi-tale\u002Ftc-archi-os-reseaux\u002F1.systeme-sur-puce",{"title":509,"path":510,"stem":511},"Processus et ordonnancement par l'OS","\u002Fnsi-tale\u002Ftc-archi-os-reseaux\u002Fprocessus-os","2.nsi-tale\u002Ftc-archi-os-reseaux\u002F2.processus-os",{"title":513,"path":514,"stem":515},"L'interblocage (deadlock)","\u002Fnsi-tale\u002Ftc-archi-os-reseaux\u002Finterblocage","2.nsi-tale\u002Ftc-archi-os-reseaux\u002F3.interblocage",{"title":517,"path":518,"stem":519},"Principes du routage","\u002Fnsi-tale\u002Ftc-archi-os-reseaux\u002Froutage-principes","2.nsi-tale\u002Ftc-archi-os-reseaux\u002F4.routage-principes",{"title":521,"path":522,"stem":523},"Protocoles de routage RIP et OSPF","\u002Fnsi-tale\u002Ftc-archi-os-reseaux\u002Fprotocoles-rip-ospf","2.nsi-tale\u002Ftc-archi-os-reseaux\u002F5.protocoles-rip-ospf",{"title":525,"path":526,"stem":527},"Chiffrement symétrique","\u002Fnsi-tale\u002Ftc-archi-os-reseaux\u002Fchiffrement-symetrique","2.nsi-tale\u002Ftc-archi-os-reseaux\u002F6.chiffrement-symetrique",{"title":529,"path":530,"stem":531},"Chiffrement asymétrique","\u002Fnsi-tale\u002Ftc-archi-os-reseaux\u002Fchiffrement-asymetrique","2.nsi-tale\u002Ftc-archi-os-reseaux\u002F7.chiffrement-asymetrique",{"title":533,"path":534,"stem":535},"HTTPS — l'échange de clé symétrique","\u002Fnsi-tale\u002Ftc-archi-os-reseaux\u002Fhttps-tls","2.nsi-tale\u002Ftc-archi-os-reseaux\u002F8.https-tls",{"title":381,"path":537,"stem":538,"children":539},"\u002Fnsi-tale\u002Ftd-langages-prog","2.nsi-tale\u002Ftd-langages-prog\u002F0.index",[540,541,544,548,552,556],{"title":381,"path":537,"stem":538},{"title":403,"path":542,"stem":543},"\u002Fnsi-tale\u002Ftd-langages-prog\u002Fmise-au-point","2.nsi-tale\u002Ftd-langages-prog\u002F1.mise-au-point",{"title":545,"path":546,"stem":547},"Modularité","\u002Fnsi-tale\u002Ftd-langages-prog\u002Fmodularite","2.nsi-tale\u002Ftd-langages-prog\u002F2.modularite",{"title":549,"path":550,"stem":551},"Récursivité","\u002Fnsi-tale\u002Ftd-langages-prog\u002Frecursivite","2.nsi-tale\u002Ftd-langages-prog\u002F3.recursivite",{"title":553,"path":554,"stem":555},"Paradigmes de programmation","\u002Fnsi-tale\u002Ftd-langages-prog\u002Fparadigmes","2.nsi-tale\u002Ftd-langages-prog\u002F4.paradigmes",{"title":557,"path":558,"stem":559},"Programme comme donnée — calculabilité et indécidabilité","\u002Fnsi-tale\u002Ftd-langages-prog\u002Fprogramme-comme-donnee","2.nsi-tale\u002Ftd-langages-prog\u002F5.programme-comme-donnee",{"title":411,"path":561,"stem":562,"children":563},"\u002Fnsi-tale\u002Fte-algorithmique","2.nsi-tale\u002Fte-algorithmique\u002F0.index",[564,565,569,573,577,581],{"title":411,"path":561,"stem":562},{"title":566,"path":567,"stem":568},"Algorithmes sur les arbres binaires","\u002Fnsi-tale\u002Fte-algorithmique\u002Farbres-binaires-algos","2.nsi-tale\u002Fte-algorithmique\u002F1.arbres-binaires-algos",{"title":570,"path":571,"stem":572},"Parcours de graphes — DFS, BFS, cycles, chemins","\u002Fnsi-tale\u002Fte-algorithmique\u002Fgraphes-parcours","2.nsi-tale\u002Fte-algorithmique\u002F2.graphes-parcours",{"title":574,"path":575,"stem":576},"Diviser pour régner","\u002Fnsi-tale\u002Fte-algorithmique\u002Fdiviser-pour-regner","2.nsi-tale\u002Fte-algorithmique\u002F3.diviser-pour-regner",{"title":578,"path":579,"stem":580},"Programmation dynamique","\u002Fnsi-tale\u002Fte-algorithmique\u002Fprogrammation-dynamique","2.nsi-tale\u002Fte-algorithmique\u002F4.programmation-dynamique",{"title":582,"path":583,"stem":584},"Recherche textuelle — l'algorithme de Boyer-Moore","\u002Fnsi-tale\u002Fte-algorithmique\u002Frecherche-textuelle","2.nsi-tale\u002Fte-algorithmique\u002F5.recherche-textuelle",{"id":586,"title":521,"bo":587,"body":589,"description":2226,"eval":2227,"extension":2228,"labo":2227,"meta":2229,"navigation":2230,"path":522,"quizzes":2231,"readingTime":2238,"seo":2239,"stem":523,"tp":2227,"__hash__":2240},"cours\u002F2.nsi-tale\u002Ftc-archi-os-reseaux\u002F5.protocoles-rip-ospf.md",[588],"TC03",{"type":590,"value":591,"toc":2216},"minimark",[592,597,638,642,649,771,778,782,828,994,1010,1023,1047,1051,1061,1084,1094,1312,1316,1396,1403,1435,1875,2091,2111,2115,2195,2199,2214],[593,594,596],"h2",{"id":595},"introduction","Introduction",[598,599,600,601,605,606,609,610,613,614,617,618,621,622,625,626,629,630,633,634,637],"p",{},"Vous avez vu au cours précédent qu'un routeur consulte sa ",[602,603,604],"strong",{},"table de routage","\npour décider du prochain saut. Reste une question : ",[602,607,608],{},"d'où viennent les\nlignes de cette table"," ? Sur un petit réseau, l'administrateur peut les\nécrire à la main. Sur Internet, qui regroupe des centaines de milliers de\nrouteurs, c'est impossible. Les routeurs ",[602,611,612],{},"dialoguent entre eux"," via un\n",[602,615,616],{},"protocole de routage"," qui leur permet de découvrir le réseau et de\ncalculer les meilleures routes. Le programme officiel\n(",[619,620],"bo-ref",{"code":588},") en retient deux représentants : ",[602,623,624],{},"RIP"," et ",[602,627,628],{},"OSPF",".\nIls incarnent deux philosophies très différentes, et le lien avec les\n",[602,631,632],{},"algorithmes sur graphes"," que vous étudiez en parallèle (chapitre\n",[619,635],{"code":636},"TE",") y devient explicite.",[593,639,641],{"id":640},"le-réseau-vu-comme-un-graphe","Le réseau vu comme un graphe",[598,643,644,645,648],{},"Avant de comparer les protocoles, posez le bon modèle. Un réseau de routeurs\nse décrit comme un ",[602,646,647],{},"graphe"," :",[650,651,652,660,666],"ul",{},[653,654,655,656,659],"li",{},"les ",[602,657,658],{},"sommets"," sont les routeurs ;",[653,661,655,662,665],{},[602,663,664],{},"arêtes"," sont les liens directs entre routeurs ;",[653,667,668,669,672,673,677,678,681,682,770],{},"chaque arête porte une ",[602,670,671],{},"valeur"," — soit ",[674,675,676],"code",{},"1"," si l'on compte les sauts,\nsoit un ",[602,679,680],{},"coût"," ",[683,684,687,728],"span",{"className":685},[686],"katex",[683,688,691],{"className":689},[690],"katex-mathml",[692,693,695],"math",{"xmlns":694},"http:\u002F\u002Fwww.w3.org\u002F1998\u002FMath\u002FMathML",[696,697,698,723],"semantics",{},[699,700,701,705,710,713,717,720],"mrow",{},[702,703,704],"mi",{},"c",[706,707,709],"mo",{"stretchy":708},"false","(",[702,711,712],{},"u",[706,714,716],{"separator":715},"true",",",[702,718,719],{},"v",[706,721,722],{"stretchy":708},")",[724,725,727],"annotation",{"encoding":726},"application\u002Fx-tex","c(u, v)",[683,729,732],{"className":730,"ariaHidden":715},[731],"katex-html",[683,733,736,741,746,750,753,757,762,766],{"className":734},[735],"base",[683,737],{"className":738,"style":740},[739],"strut","height:1em;vertical-align:-0.25em;",[683,742,704],{"className":743},[744,745],"mord","mathnormal",[683,747,709],{"className":748},[749],"mopen",[683,751,712],{"className":752},[744,745],[683,754,716],{"className":755},[756],"mpunct",[683,758],{"className":759,"style":761},[760],"mspace","margin-right:0.1667em;",[683,763,719],{"className":764,"style":765},[744,745],"margin-right:0.0359em;",[683,767,722],{"className":768},[769],"mclose"," qui modélise un délai ou une bande passante\ninverse.",[598,772,773,774,777],{},"Trouver la meilleure route entre deux routeurs revient à trouver un ",[602,775,776],{},"plus\ncourt chemin"," dans ce graphe. C'est exactement le problème que résolvent\nles algorithmes vus en algorithmique terminale.",[593,779,781],{"id":780},"rip-routing-information-protocol","RIP — Routing Information Protocol",[598,783,784,785,788,789,792,793,823,824,827],{},"RIP est le protocole ",[602,786,787],{},"historique",", simple à concevoir, limité à l'échelle.\nSa métrique est le ",[602,790,791],{},"nombre de sauts"," : chaque arête coûte ",[683,794,796,810],{"className":795},[686],[683,797,799],{"className":798},[690],[692,800,801],{"xmlns":694},[696,802,803,808],{},[699,804,805],{},[806,807,676],"mn",{},[724,809,676],{"encoding":726},[683,811,813],{"className":812,"ariaHidden":715},[731],[683,814,816,820],{"className":815},[735],[683,817],{"className":818,"style":819},[739],"height:0.6444em;",[683,821,676],{"className":822},[744],". C'est la\nlogique du ",[602,825,826],{},"voyage en avion qu'on évalue au nombre d'escales"," : on prend la\nroute avec le moins d'escales, sans considération de durée ou de tarif. Vite\ncalculé, mais grossier — un vol direct de 12 heures « bat » un trajet à\ndeux escales de 4 heures.",[650,829,830,900,987],{},[653,831,832,833,836,837,868,869,899],{},"Chaque routeur diffuse régulièrement à ses ",[602,834,835],{},"voisins directs"," un résumé de\nsa propre table : « pour le réseau ",[683,838,840,854],{"className":839},[686],[683,841,843],{"className":842},[690],[692,844,845],{"xmlns":694},[696,846,847,852],{},[699,848,849],{},[702,850,851],{},"X",[724,853,851],{"encoding":726},[683,855,857],{"className":856,"ariaHidden":715},[731],[683,858,860,864],{"className":859},[735],[683,861],{"className":862,"style":863},[739],"height:0.6833em;",[683,865,851],{"className":866,"style":867},[744,745],"margin-right:0.0785em;",", je suis à ",[683,870,872,886],{"className":871},[686],[683,873,875],{"className":874},[690],[692,876,877],{"xmlns":694},[696,878,879,884],{},[699,880,881],{},[702,882,883],{},"h",[724,885,883],{"encoding":726},[683,887,889],{"className":888,"ariaHidden":715},[731],[683,890,892,896],{"className":891},[735],[683,893],{"className":894,"style":895},[739],"height:0.6944em;",[683,897,883],{"className":898},[744,745]," sauts ».",[653,901,902,903,931,932,899],{},"À la réception, chaque voisin met à jour sa table : « pour aller à ",[683,904,906,919],{"className":905},[686],[683,907,909],{"className":908},[690],[692,910,911],{"xmlns":694},[696,912,913,917],{},[699,914,915],{},[702,916,851],{},[724,918,851],{"encoding":726},[683,920,922],{"className":921,"ariaHidden":715},[731],[683,923,925,928],{"className":924},[735],[683,926],{"className":927,"style":863},[739],[683,929,851],{"className":930,"style":867},[744,745]," par\nce voisin, il faut ",[683,933,935,954],{"className":934},[686],[683,936,938],{"className":937},[690],[692,939,940],{"xmlns":694},[696,941,942,951],{},[699,943,944,946,949],{},[702,945,883],{},[706,947,948],{},"+",[806,950,676],{},[724,952,953],{"encoding":726},"h + 1",[683,955,957,978],{"className":956,"ariaHidden":715},[731],[683,958,960,964,967,971,975],{"className":959},[735],[683,961],{"className":962,"style":963},[739],"height:0.7778em;vertical-align:-0.0833em;",[683,965,883],{"className":966},[744,745],[683,968],{"className":969,"style":970},[760],"margin-right:0.2222em;",[683,972,948],{"className":973},[974],"mbin",[683,976],{"className":977,"style":970},[760],[683,979,981,984],{"className":980},[735],[683,982],{"className":983,"style":819},[739],[683,985,676],{"className":986},[744],[653,988,989,990,993],{},"La métrique est ",[602,991,992],{},"plafonnée à 15"," — au-delà, le réseau est considéré comme\ninaccessible. RIP n'est donc utilisable que sur des réseaux modestes.",[598,995,996,997,1000,1001,1004,1005,1009],{},"L'algorithme sous-jacent — chaque routeur ne connaît que ses voisins et\néchange des ",[602,998,999],{},"distances"," au fil du temps — est une variante distribuée\nd'un classique des algorithmes sur graphes, ",[602,1002,1003],{},"Bellman-Ford"," (mis à jour\nitérative des distances par relaxation locale). Vous n'avez pas à le\nconnaître en détail au niveau Terminale, juste à retenir l'idée :\n",[1006,1007,1008],"em",{},"chacun met à jour ses estimations à partir de celles de ses voisins",".",[1011,1012,1013],"note",{},[598,1014,1015,1018,1019,1022],{},[602,1016,1017],{},"Avantages"," : simplicité, faible empreinte mémoire.\n",[602,1020,1021],{},"Inconvénients"," : convergence lente, métrique grossière (un lien fibre et\nun lien satellite comptent pareil), limite des 15 sauts.",[1024,1025,1027,1034],"self-eval-qcm",{"correct":676,"slug":1026},"protocoles-rip-ospf-c1",[1028,1029,1031],"template",{"v-slot:question":1030},"",[598,1032,1033],{},"Avec RIP, un lien fibre de 10 Gb\u002Fs et un lien Wi-Fi lent comptent…",[1028,1035,1036],{"v-slot:choices":1030},[650,1037,1038,1041,1044],{},[653,1039,1040],{},"différemment selon le débit",[653,1042,1043],{},"pareil — un saut chacun",[653,1045,1046],{},"selon une moyenne pondérée",[593,1048,1050],{"id":1049},"ospf-open-shortest-path-first","OSPF — Open Shortest Path First",[598,1052,1053,1054,1056,1057,1060],{},"OSPF est plus moderne, conçu pour des réseaux de grande taille. Sa métrique\nest un ",[602,1055,680],{}," numérique : chaque lien porte une valeur qui reflète sa\nqualité (typiquement inversement proportionnelle à la bande passante). Si\nRIP comptait les escales, OSPF compare le ",[602,1058,1059],{},"prix total des billets"," :\nchaque tronçon a un coût, et l'on cherche le trajet le moins cher dans son\nensemble — quitte à passer par plus d'escales.",[650,1062,1063,1070,1077],{},[653,1064,1065,1066,1069],{},"Chaque routeur ",[602,1067,1068],{},"inonde"," le réseau (au sens : diffuse de proche en proche\nà tous ses voisins, qui répercutent à leurs voisins) d'un message décrivant\nses propres liens et leurs coûts.",[653,1071,1072,1073,1076],{},"Chaque routeur reconstruit ainsi une ",[602,1074,1075],{},"carte complète"," du réseau — le\ngraphe pondéré entier.",[653,1078,1079,1080,1083],{},"Il applique alors localement l'",[602,1081,1082],{},"algorithme de Dijkstra"," pour calculer le\nplus court chemin vers chaque destination.",[598,1085,1086,1087,1090,1091,1093],{},"C'est le lien direct avec votre chapitre d'algorithmique : OSPF ",[602,1088,1089],{},"est"," une\napplication industrielle de Dijkstra. Lisez le code et la preuve d'invariant\nde Dijkstra en ",[619,1092],{"code":636},", vous tenez l'essentiel d'OSPF.",[1095,1096,1097],"tip",{},[598,1098,1099,1102,1103,1253,1254,1282,1283,1311],{},[602,1100,1101],{},"Exemple de coûts OSPF"," : sur un routeur Cisco, le coût par défaut d'une\ninterface est ",[683,1104,1106,1149],{"className":1105},[686],[683,1107,1109],{"className":1108},[690],[692,1110,1111],{"xmlns":694},[696,1112,1113,1146],{},[699,1114,1115,1124,1128],{},[1116,1117,1118,1121],"msup",{},[806,1119,1120],{},"10",[806,1122,1123],{},"8",[702,1125,1127],{"mathvariant":1126},"normal","\u002F",[699,1129,1130,1134,1143],{},[1131,1132,1133],"mtext",{},"d",[1135,1136,1137,1140],"mover",{"accent":715},[1131,1138,1139],{},"e",[706,1141,1142],{},"ˊ",[1131,1144,1145],{},"bit",[724,1147,1148],{"encoding":726},"10^8 \u002F \\text{débit}",[683,1150,1152],{"className":1151,"ariaHidden":715},[731],[683,1153,1155,1159,1162,1204,1207],{"className":1154},[735],[683,1156],{"className":1157,"style":1158},[739],"height:1.0641em;vertical-align:-0.25em;",[683,1160,676],{"className":1161},[744],[683,1163,1165,1169],{"className":1164},[744],[683,1166,1168],{"className":1167},[744],"0",[683,1170,1173],{"className":1171},[1172],"msupsub",[683,1174,1177],{"className":1175},[1176],"vlist-t",[683,1178,1181],{"className":1179},[1180],"vlist-r",[683,1182,1186],{"className":1183,"style":1185},[1184],"vlist","height:0.8141em;",[683,1187,1189,1194],{"style":1188},"top:-3.063em;margin-right:0.05em;",[683,1190],{"className":1191,"style":1193},[1192],"pstrut","height:2.7em;",[683,1195,1201],{"className":1196},[1197,1198,1199,1200],"sizing","reset-size6","size3","mtight",[683,1202,1123],{"className":1203},[744,1200],[683,1205,1127],{"className":1206},[744],[683,1208,1211,1214,1250],{"className":1209},[744,1210],"text",[683,1212,1133],{"className":1213},[744],[683,1215,1218],{"className":1216},[744,1217],"accent",[683,1219,1221],{"className":1220},[1176],[683,1222,1224],{"className":1223},[1180],[683,1225,1227,1237],{"className":1226,"style":895},[1184],[683,1228,1230,1234],{"style":1229},"top:-3em;",[683,1231],{"className":1232,"style":1233},[1192],"height:3em;",[683,1235,1139],{"className":1236},[744],[683,1238,1239,1242],{"style":1229},[683,1240],{"className":1241,"style":1233},[1192],[683,1243,1247],{"className":1244,"style":1246},[1245],"accent-body","left:-0.25em;",[683,1248,1142],{"className":1249},[744],[683,1251,1145],{"className":1252},[744],". Une interface 100 Mb\u002Fs a un coût de ",[683,1255,1257,1270],{"className":1256},[686],[683,1258,1260],{"className":1259},[690],[692,1261,1262],{"xmlns":694},[696,1263,1264,1268],{},[699,1265,1266],{},[806,1267,676],{},[724,1269,676],{"encoding":726},[683,1271,1273],{"className":1272,"ariaHidden":715},[731],[683,1274,1276,1279],{"className":1275},[735],[683,1277],{"className":1278,"style":819},[739],[683,1280,676],{"className":1281},[744],",\nune interface 10 Mb\u002Fs a un coût de ",[683,1284,1286,1299],{"className":1285},[686],[683,1287,1289],{"className":1288},[690],[692,1290,1291],{"xmlns":694},[696,1292,1293,1297],{},[699,1294,1295],{},[806,1296,1120],{},[724,1298,1120],{"encoding":726},[683,1300,1302],{"className":1301,"ariaHidden":715},[731],[683,1303,1305,1308],{"className":1304},[735],[683,1306],{"className":1307,"style":819},[739],[683,1309,1120],{"className":1310},[744],". Plus le lien est rapide, plus son\ncoût est faible — donc plus il est préféré.",[593,1313,1315],{"id":1314},"un-exemple-de-calcul-ospf","Un exemple de calcul OSPF",[598,1317,1318,1319,1395],{},"Considérez quatre routeurs ",[683,1320,1322,1352],{"className":1321},[686],[683,1323,1325],{"className":1324},[690],[692,1326,1327],{"xmlns":694},[696,1328,1329,1349],{},[699,1330,1331,1334,1336,1339,1341,1344,1346],{},[702,1332,1333],{},"A",[706,1335,716],{"separator":715},[702,1337,1338],{},"B",[706,1340,716],{"separator":715},[702,1342,1343],{},"C",[706,1345,716],{"separator":715},[702,1347,1348],{},"D",[724,1350,1351],{"encoding":726},"A, B, C, D",[683,1353,1355],{"className":1354,"ariaHidden":715},[731],[683,1356,1358,1362,1365,1368,1371,1375,1378,1381,1385,1388,1391],{"className":1357},[735],[683,1359],{"className":1360,"style":1361},[739],"height:0.8778em;vertical-align:-0.1944em;",[683,1363,1333],{"className":1364},[744,745],[683,1366,716],{"className":1367},[756],[683,1369],{"className":1370,"style":761},[760],[683,1372,1338],{"className":1373,"style":1374},[744,745],"margin-right:0.0502em;",[683,1376,716],{"className":1377},[756],[683,1379],{"className":1380,"style":761},[760],[683,1382,1343],{"className":1383,"style":1384},[744,745],"margin-right:0.0715em;",[683,1386,716],{"className":1387},[756],[683,1389],{"className":1390,"style":761},[760],[683,1392,1348],{"className":1393,"style":1394},[744,745],"margin-right:0.0278em;"," et les coûts donnés :",[1397,1398],"illustration",{"alt":1399,"kind":1400,"src":1401,"svg":1402},"Réseau OSPF 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total",[1445,1452,1453],{},"Route",[1455,1456,1457,1577,1715],"tbody",{},[1442,1458,1459,1490,1521],{},[1460,1461,1462],"td",{},[683,1463,1465,1478],{"className":1464},[686],[683,1466,1468],{"className":1467},[690],[692,1469,1470],{"xmlns":694},[696,1471,1472,1476],{},[699,1473,1474],{},[702,1475,1338],{},[724,1477,1338],{"encoding":726},[683,1479,1481],{"className":1480,"ariaHidden":715},[731],[683,1482,1484,1487],{"className":1483},[735],[683,1485],{"className":1486,"style":863},[739],[683,1488,1338],{"className":1489,"style":1374},[744,745],[1460,1491,1492],{},[683,1493,1495,1509],{"className":1494},[686],[683,1496,1498],{"className":1497},[690],[692,1499,1500],{"xmlns":694},[696,1501,1502,1507],{},[699,1503,1504],{},[806,1505,1506],{},"2",[724,1508,1506],{"encoding":726},[683,1510,1512],{"className":1511,"ariaHidden":715},[731],[683,1513,1515,1518],{"className":1514},[735],[683,1516],{"className":1517,"style":819},[739],[683,1519,1506],{"className":1520},[744],[1460,1522,1523],{},[683,1524,1526,1545],{"className":1525},[686],[683,1527,1529],{"className":1528},[690],[692,1530,1531],{"xmlns":694},[696,1532,1533,1542],{},[699,1534,1535,1537,1540],{},[702,1536,1333],{},[706,1538,1539],{},"→",[702,1541,1338],{},[724,1543,1544],{"encoding":726},"A \\to B",[683,1546,1548,1568],{"className":1547,"ariaHidden":715},[731],[683,1549,1551,1554,1557,1561,1565],{"className":1550},[735],[683,1552],{"className":1553,"style":863},[739],[683,1555,1333],{"className":1556},[744,745],[683,1558],{"className":1559,"style":1560},[760],"margin-right:0.2778em;",[683,1562,1539],{"className":1563},[1564],"mrel",[683,1566],{"className":1567,"style":1560},[760],[683,1569,1571,1574],{"className":1570},[735],[683,1572],{"className":1573,"style":863},[739],[683,1575,1338],{"className":1576,"style":1374},[744,745],[1442,1578,1579,1609,1640],{},[1460,1580,1581],{},[683,1582,1584,1597],{"className":1583},[686],[683,1585,1587],{"className":1586},[690],[692,1588,1589],{"xmlns":694},[696,1590,1591,1595],{},[699,1592,1593],{},[702,1594,1343],{},[724,1596,1343],{"encoding":726},[683,1598,1600],{"className":1599,"ariaHidden":715},[731],[683,1601,1603,1606],{"className":1602},[735],[683,1604],{"className":1605,"style":863},[739],[683,1607,1343],{"className":1608,"style":1384},[744,745],[1460,1610,1611],{},[683,1612,1614,1628],{"className":1613},[686],[683,1615,1617],{"className":1616},[690],[692,1618,1619],{"xmlns":694},[696,1620,1621,1626],{},[699,1622,1623],{},[806,1624,1625],{},"3",[724,1627,1625],{"encoding":726},[683,1629,1631],{"className":1630,"ariaHidden":715},[731],[683,1632,1634,1637],{"className":1633},[735],[683,1635],{"className":1636,"style":819},[739],[683,1638,1625],{"className":1639},[744],[1460,1641,1642],{},[683,1643,1645,1667],{"className":1644},[686],[683,1646,1648],{"className":1647},[690],[692,1649,1650],{"xmlns":694},[696,1651,1652,1664],{},[699,1653,1654,1656,1658,1660,1662],{},[702,1655,1333],{},[706,1657,1539],{},[702,1659,1338],{},[706,1661,1539],{},[702,1663,1343],{},[724,1665,1666],{"encoding":726},"A \\to B \\to C",[683,1668,1670,1688,1706],{"className":1669,"ariaHidden":715},[731],[683,1671,1673,1676,1679,1682,1685],{"className":1672},[735],[683,1674],{"className":1675,"style":863},[739],[683,1677,1333],{"className":1678},[744,745],[683,1680],{"className":1681,"style":1560},[760],[683,1683,1539],{"className":1684},[1564],[683,1686],{"className":1687,"style":1560},[760],[683,1689,1691,1694,1697,1700,1703],{"className":1690},[735],[683,1692],{"className":1693,"style":863},[739],[683,1695,1338],{"className":1696,"style":1374},[744,745],[683,1698],{"className":1699,"style":1560},[760],[683,1701,1539],{"className":1702},[1564],[683,1704],{"className":1705,"style":1560},[760],[683,1707,1709,1712],{"className":1708},[735],[683,1710],{"className":1711,"style":863},[739],[683,1713,1343],{"className":1714,"style":1384},[744,745],[1442,1716,1717,1747,1778],{},[1460,1718,1719],{},[683,1720,1722,1735],{"className":1721},[686],[683,1723,1725],{"className":1724},[690],[692,1726,1727],{"xmlns":694},[696,1728,1729,1733],{},[699,1730,1731],{},[702,1732,1348],{},[724,1734,1348],{"encoding":726},[683,1736,1738],{"className":1737,"ariaHidden":715},[731],[683,1739,1741,1744],{"className":1740},[735],[683,1742],{"className":1743,"style":863},[739],[683,1745,1348],{"className":1746,"style":1394},[744,745],[1460,1748,1749],{},[683,1750,1752,1766],{"className":1751},[686],[683,1753,1755],{"className":1754},[690],[692,1756,1757],{"xmlns":694},[696,1758,1759,1764],{},[699,1760,1761],{},[806,1762,1763],{},"6",[724,1765,1763],{"encoding":726},[683,1767,1769],{"className":1768,"ariaHidden":715},[731],[683,1770,1772,1775],{"className":1771},[735],[683,1773],{"className":1774,"style":819},[739],[683,1776,1763],{"className":1777},[744],[1460,1779,1780],{},[683,1781,1783,1809],{"className":1782},[686],[683,1784,1786],{"className":1785},[690],[692,1787,1788],{"xmlns":694},[696,1789,1790,1806],{},[699,1791,1792,1794,1796,1798,1800,1802,1804],{},[702,1793,1333],{},[706,1795,1539],{},[702,1797,1338],{},[706,1799,1539],{},[702,1801,1343],{},[706,1803,1539],{},[702,1805,1348],{},[724,1807,1808],{"encoding":726},"A \\to B \\to C \\to D",[683,1810,1812,1830,1848,1866],{"className":1811,"ariaHidden":715},[731],[683,1813,1815,1818,1821,1824,1827],{"className":1814},[735],[683,1816],{"className":1817,"style":863},[739],[683,1819,1333],{"className":1820},[744,745],[683,1822],{"className":1823,"style":1560},[760],[683,1825,1539],{"className":1826},[1564],[683,1828],{"className":1829,"style":1560},[760],[683,1831,1833,1836,1839,1842,1845],{"className":1832},[735],[683,1834],{"className":1835,"style":863},[739],[683,1837,1338],{"className":1838,"style":1374},[744,745],[683,1840],{"className":1841,"style":1560},[760],[683,1843,1539],{"className":1844},[1564],[683,1846],{"className":1847,"style":1560},[760],[683,1849,1851,1854,1857,1860,1863],{"className":1850},[735],[683,1852],{"className":1853,"style":863},[739],[683,1855,1343],{"className":1856,"style":1384},[744,745],[683,1858],{"className":1859,"style":1560},[760],[683,1861,1539],{"className":1862},[1564],[683,1864],{"className":1865,"style":1560},[760],[683,1867,1869,1872],{"className":1868},[735],[683,1870],{"className":1871,"style":863},[739],[683,1873,1348],{"className":1874,"style":1394},[744,745],[598,1876,1877,1878,1906,1907,1958,1959,1988,1989,2061,2062,2090],{},"La table de routage de ",[683,1879,1881,1894],{"className":1880},[686],[683,1882,1884],{"className":1883},[690],[692,1885,1886],{"xmlns":694},[696,1887,1888,1892],{},[699,1889,1890],{},[702,1891,1333],{},[724,1893,1333],{"encoding":726},[683,1895,1897],{"className":1896,"ariaHidden":715},[731],[683,1898,1900,1903],{"className":1899},[735],[683,1901],{"className":1902,"style":863},[739],[683,1904,1333],{"className":1905},[744,745]," retient ces chemins. À noter : la route directe\n",[683,1908,1910,1928],{"className":1909},[686],[683,1911,1913],{"className":1912},[690],[692,1914,1915],{"xmlns":694},[696,1916,1917,1925],{},[699,1918,1919,1921,1923],{},[702,1920,1333],{},[706,1922,1539],{},[702,1924,1343],{},[724,1926,1927],{"encoding":726},"A \\to C",[683,1929,1931,1949],{"className":1930,"ariaHidden":715},[731],[683,1932,1934,1937,1940,1943,1946],{"className":1933},[735],[683,1935],{"className":1936,"style":863},[739],[683,1938,1333],{"className":1939},[744,745],[683,1941],{"className":1942,"style":1560},[760],[683,1944,1539],{"className":1945},[1564],[683,1947],{"className":1948,"style":1560},[760],[683,1950,1952,1955],{"className":1951},[735],[683,1953],{"className":1954,"style":863},[739],[683,1956,1343],{"className":1957,"style":1384},[744,745]," (coût ",[683,1960,1962,1976],{"className":1961},[686],[683,1963,1965],{"className":1964},[690],[692,1966,1967],{"xmlns":694},[696,1968,1969,1974],{},[699,1970,1971],{},[806,1972,1973],{},"5",[724,1975,1973],{"encoding":726},[683,1977,1979],{"className":1978,"ariaHidden":715},[731],[683,1980,1982,1985],{"className":1981},[735],[683,1983],{"className":1984,"style":819},[739],[683,1986,1973],{"className":1987},[744],") est écartée au profit du détour ",[683,1990,1992,2013],{"className":1991},[686],[683,1993,1995],{"className":1994},[690],[692,1996,1997],{"xmlns":694},[696,1998,1999,2011],{},[699,2000,2001,2003,2005,2007,2009],{},[702,2002,1333],{},[706,2004,1539],{},[702,2006,1338],{},[706,2008,1539],{},[702,2010,1343],{},[724,2012,1666],{"encoding":726},[683,2014,2016,2034,2052],{"className":2015,"ariaHidden":715},[731],[683,2017,2019,2022,2025,2028,2031],{"className":2018},[735],[683,2020],{"className":2021,"style":863},[739],[683,2023,1333],{"className":2024},[744,745],[683,2026],{"className":2027,"style":1560},[760],[683,2029,1539],{"className":2030},[1564],[683,2032],{"className":2033,"style":1560},[760],[683,2035,2037,2040,2043,2046,2049],{"className":2036},[735],[683,2038],{"className":2039,"style":863},[739],[683,2041,1338],{"className":2042,"style":1374},[744,745],[683,2044],{"className":2045,"style":1560},[760],[683,2047,1539],{"className":2048},[1564],[683,2050],{"className":2051,"style":1560},[760],[683,2053,2055,2058],{"className":2054},[735],[683,2056],{"className":2057,"style":863},[739],[683,2059,1343],{"className":2060,"style":1384},[744,745]," (coût\n",[683,2063,2065,2078],{"className":2064},[686],[683,2066,2068],{"className":2067},[690],[692,2069,2070],{"xmlns":694},[696,2071,2072,2076],{},[699,2073,2074],{},[806,2075,1625],{},[724,2077,1625],{"encoding":726},[683,2079,2081],{"className":2080,"ariaHidden":715},[731],[683,2082,2084,2087],{"className":2083},[735],[683,2085],{"className":2086,"style":819},[739],[683,2088,1625],{"className":2089},[744],"). Une route plus longue en nombre de sauts peut être préférée si son\ncoût total est moindre — c'est précisément ce que RIP ne sait pas faire.",[1024,2092,2094,2099],{"correct":676,"slug":2093},"protocoles-rip-ospf-c2",[1028,2095,2096],{"v-slot:question":1030},[598,2097,2098],{},"OSPF utilise quel algorithme pour calculer les plus courts chemins ?",[1028,2100,2101],{"v-slot:choices":1030},[650,2102,2103,2106,2109],{},[653,2104,2105],{},"Bellman-Ford distribué",[653,2107,2108],{},"Dijkstra",[653,2110,429],{},[593,2112,2114],{"id":2113},"rip-vs-ospf-en-un-tableau","RIP vs OSPF en un tableau",[1436,2116,2117,2128],{},[1439,2118,2119],{},[1442,2120,2121,2124,2126],{},[1445,2122,2123],{},"Critère",[1445,2125,624],{},[1445,2127,628],{},[1455,2129,2130,2141,2152,2162,2173,2184],{},[1442,2131,2132,2135,2138],{},[1460,2133,2134],{},"Métrique",[1460,2136,2137],{},"Nombre de sauts",[1460,2139,2140],{},"Coût pondéré",[1442,2142,2143,2146,2149],{},[1460,2144,2145],{},"Vision du réseau",[1460,2147,2148],{},"Voisins seulement",[1460,2150,2151],{},"Graphe complet",[1442,2153,2154,2157,2159],{},[1460,2155,2156],{},"Algorithme",[1460,2158,2105],{},[1460,2160,2161],{},"Dijkstra local",[1442,2163,2164,2167,2170],{},[1460,2165,2166],{},"Plafond",[1460,2168,2169],{},"15 sauts",[1460,2171,2172],{},"Pas de plafond pratique",[1442,2174,2175,2178,2181],{},[1460,2176,2177],{},"Convergence",[1460,2179,2180],{},"Lente",[1460,2182,2183],{},"Rapide",[1442,2185,2186,2189,2192],{},[1460,2187,2188],{},"Échelle",[1460,2190,2191],{},"Petits réseaux",[1460,2193,2194],{},"Grands réseaux",[593,2196,2198],{"id":2197},"pour-aller-plus-loin","Pour aller plus loin",[598,2200,2201,2202,2205,2206,2209,2210,2213],{},"Les deux protocoles décrits sont des ",[602,2203,2204],{},"IGP"," (",[1006,2207,2208],{},"Interior Gateway Protocols",") :\nils opèrent à l'intérieur d'un même domaine administratif (un campus, une\nentreprise, un FAI). Entre opérateurs, c'est ",[602,2211,2212],{},"BGP"," qui prend le relais, sur\nune logique encore différente — hors programme NSI, mais bonne curiosité.",[619,2215],{"code":588},{"title":1030,"searchDepth":2217,"depth":2217,"links":2218},2,[2219,2220,2221,2222,2223,2224,2225],{"id":595,"depth":2217,"text":596},{"id":640,"depth":2217,"text":641},{"id":780,"depth":2217,"text":781},{"id":1049,"depth":2217,"text":1050},{"id":1314,"depth":2217,"text":1315},{"id":2113,"depth":2217,"text":2114},{"id":2197,"depth":2217,"text":2198},"Comment les routeurs construisent leurs tables automatiquement — par nombre de sauts avec RIP, par coût avec OSPF, en lien direct avec les algorithmes de plus court chemin sur un graphe.",null,"md",{},true,[2232,2236],{"slug":1026,"kind":2233,"question":1033,"choices":2234,"correct":676,"multi":2235,"explanation":1030},"qcm",[1040,1043,1046],false,{"slug":2093,"kind":2233,"question":2098,"choices":2237,"correct":676,"multi":2235,"explanation":1030},[2105,2108,429],1,{"title":521,"description":2226},"2dkPelWvsakpdab9H26C-SMcl0ArwDwWhY-fO3BLh0M",{"id":2242,"title":2243,"bo":2244,"body":2245,"description":3306,"eval":2227,"extension":2228,"labo":2227,"meta":3307,"navigation":2235,"path":3308,"quizzes":3309,"readingTime":2238,"seo":3310,"stem":3311,"tp":2227,"__hash__":3312},"coursMemo\u002F2.nsi-tale\u002Ftc-archi-os-reseaux\u002F5.protocoles-rip-ospf.memo.md","Protocoles RIP et OSPF — l'essentiel",[588],{"type":590,"value":2246,"toc":3299},[2247,2251,2256,2260,2479,2483,2533,2537,3279,3283],[593,2248,2250],{"id":2249},"en-une-phrase","En une phrase",[598,2252,2253],{},[602,2254,2255],{},"RIP compte des sauts (Bellman-Ford distribué, plafond 15), OSPF compare\ndes coûts en appliquant Dijkstra sur le graphe complet du réseau — un lien\ndirect avec les algorithmes de plus court chemin.",[593,2257,2259],{"id":2258},"à-mémoriser","À mémoriser",[650,2261,2262,2268,2282,2467,2473],{},[653,2263,2264,2265,2267],{},"Le réseau se modélise comme un ",[602,2266,647],{}," : sommets = routeurs, arêtes =\nliens, poids = saut ou coût.",[653,2269,2270,2272,2273,2275,2276,2279,2280,1009],{},[602,2271,624],{}," : métrique = ",[602,2274,791],{},", plafond ",[602,2277,2278],{},"15",", échange de\ndistances avec les voisins, algorithme ",[602,2281,2105],{},[653,2283,2284,2272,2286,681,2288,2345,2346,2464,2465,1009],{},[602,2285,628],{},[602,2287,680],{},[683,2289,2291,2315],{"className":2290},[686],[683,2292,2294],{"className":2293},[690],[692,2295,2296],{"xmlns":694},[696,2297,2298,2312],{},[699,2299,2300,2302,2304,2306,2308,2310],{},[702,2301,704],{},[706,2303,709],{"stretchy":708},[702,2305,712],{},[706,2307,716],{"separator":715},[702,2309,719],{},[706,2311,722],{"stretchy":708},[724,2313,2314],{"encoding":726},"c(u,v)",[683,2316,2318],{"className":2317,"ariaHidden":715},[731],[683,2319,2321,2324,2327,2330,2333,2336,2339,2342],{"className":2320},[735],[683,2322],{"className":2323,"style":740},[739],[683,2325,704],{"className":2326},[744,745],[683,2328,709],{"className":2329},[749],[683,2331,712],{"className":2332},[744,745],[683,2334,716],{"className":2335},[756],[683,2337],{"className":2338,"style":761},[760],[683,2340,719],{"className":2341,"style":765},[744,745],[683,2343,722],{"className":2344},[769]," (typiquement ",[683,2347,2349,2380],{"className":2348},[686],[683,2350,2352],{"className":2351},[690],[692,2353,2354],{"xmlns":694},[696,2355,2356,2378],{},[699,2357,2358,2364,2366],{},[1116,2359,2360,2362],{},[806,2361,1120],{},[806,2363,1123],{},[702,2365,1127],{"mathvariant":1126},[699,2367,2368,2370,2376],{},[1131,2369,1133],{},[1135,2371,2372,2374],{"accent":715},[1131,2373,1139],{},[706,2375,1142],{},[1131,2377,1145],{},[724,2379,1148],{"encoding":726},[683,2381,2383],{"className":2382,"ariaHidden":715},[731],[683,2384,2386,2389,2392,2421,2424],{"className":2385},[735],[683,2387],{"className":2388,"style":1158},[739],[683,2390,676],{"className":2391},[744],[683,2393,2395,2398],{"className":2394},[744],[683,2396,1168],{"className":2397},[744],[683,2399,2401],{"className":2400},[1172],[683,2402,2404],{"className":2403},[1176],[683,2405,2407],{"className":2406},[1180],[683,2408,2410],{"className":2409,"style":1185},[1184],[683,2411,2412,2415],{"style":1188},[683,2413],{"className":2414,"style":1193},[1192],[683,2416,2418],{"className":2417},[1197,1198,1199,1200],[683,2419,1123],{"className":2420},[744,1200],[683,2422,1127],{"className":2423},[744],[683,2425,2427,2430,2461],{"className":2426},[744,1210],[683,2428,1133],{"className":2429},[744],[683,2431,2433],{"className":2432},[744,1217],[683,2434,2436],{"className":2435},[1176],[683,2437,2439],{"className":2438},[1180],[683,2440,2442,2450],{"className":2441,"style":895},[1184],[683,2443,2444,2447],{"style":1229},[683,2445],{"className":2446,"style":1233},[1192],[683,2448,1139],{"className":2449},[744],[683,2451,2452,2455],{"style":1229},[683,2453],{"className":2454,"style":1233},[1192],[683,2456,2458],{"className":2457,"style":1246},[1245],[683,2459,1142],{"className":2460},[744],[683,2462,1145],{"className":2463},[744],"),\nvision complète du réseau, calcul local par ",[602,2466,2108],{},[653,2468,2469,2470,1009],{},"OSPF peut préférer une route plus longue en sauts mais ",[602,2471,2472],{},"moins coûteuse",[653,2474,2475,2476,2478],{},"Les deux sont des ",[602,2477,2204],{}," (à l'intérieur d'un domaine).",[593,2480,2482],{"id":2481},"rip-vs-ospf","RIP vs OSPF",[1436,2484,2485,2495],{},[1439,2486,2487],{},[1442,2488,2489,2491,2493],{},[1445,2490,2123],{},[1445,2492,624],{},[1445,2494,628],{},[1455,2496,2497,2507,2517,2525],{},[1442,2498,2499,2501,2504],{},[1460,2500,2134],{},[1460,2502,2503],{},"Sauts",[1460,2505,2506],{},"Coût",[1442,2508,2509,2512,2515],{},[1460,2510,2511],{},"Vision",[1460,2513,2514],{},"Voisins",[1460,2516,2151],{},[1442,2518,2519,2521,2523],{},[1460,2520,2156],{},[1460,2522,2105],{},[1460,2524,2108],{},[1442,2526,2527,2529,2531],{},[1460,2528,2188],{},[1460,2530,2191],{},[1460,2532,2194],{},[593,2534,2536],{"id":2535},"mini-calcul-ospf","Mini calcul OSPF",[598,2538,2539,2540,2882,2883,2911,2912,2940,2941,3002,3003,2940,3031,3124,3125,2940,3153,3278],{},"Graphe ",[683,2541,2543,2655],{"className":2542},[686],[683,2544,2546],{"className":2545},[690],[692,2547,2548],{"xmlns":694},[696,2549,2550,2652],{},[699,2551,2552,2554,2557,2560,2562,2564,2566,2568,2570,2572,2575,2577,2579,2581,2583,2585,2587,2589,2591,2593,2595,2597,2599,2601,2603,2605,2607,2609,2611,2613,2615,2617,2619,2621,2623,2625,2627,2629,2631,2633,2635,2637,2639,2641,2643,2645,2647,2650],{},[702,2553,1333],{},[1131,2555,2556],{}," ⁣",[706,2558,2559],{},"−",[1131,2561,2556],{},[702,2563,1338],{},[706,2565,709],{"stretchy":708},[806,2567,1506],{},[706,2569,722],{"stretchy":708},[706,2571,716],{"separator":715},[1131,2573,2574],{}," ",[702,2576,1338],{},[1131,2578,2556],{},[706,2580,2559],{},[1131,2582,2556],{},[702,2584,1343],{},[706,2586,709],{"stretchy":708},[806,2588,676],{},[706,2590,722],{"stretchy":708},[706,2592,716],{"separator":715},[1131,2594,2574],{},[702,2596,1333],{},[1131,2598,2556],{},[706,2600,2559],{},[1131,2602,2556],{},[702,2604,1343],{},[706,2606,709],{"stretchy":708},[806,2608,1973],{},[706,2610,722],{"stretchy":708},[706,2612,716],{"separator":715},[1131,2614,2574],{},[702,2616,1343],{},[1131,2618,2556],{},[706,2620,2559],{},[1131,2622,2556],{},[702,2624,1348],{},[706,2626,709],{"stretchy":708},[806,2628,1625],{},[706,2630,722],{"stretchy":708},[706,2632,716],{"separator":715},[1131,2634,2574],{},[702,2636,1338],{},[1131,2638,2556],{},[706,2640,2559],{},[1131,2642,2556],{},[702,2644,1348],{},[706,2646,709],{"stretchy":708},[806,2648,2649],{},"7",[706,2651,722],{"stretchy":708},[724,2653,2654],{"encoding":726},"A\\!-\\!B(2),\\ B\\!-\\!C(1),\\ A\\!-\\!C(5),\\ C\\!-\\!D(3),\\ B\\!-\\!D(7)",[683,2656,2658,2684,2729,2774,2819,2864],{"className":2657,"ariaHidden":715},[731],[683,2659,2661,2665,2668,2672,2675,2678,2681],{"className":2660},[735],[683,2662],{"className":2663,"style":2664},[739],"height:0.7667em;vertical-align:-0.0833em;",[683,2666,1333],{"className":2667},[744,745],[683,2669],{"className":2670,"style":2671},[760],"margin-right:-0.1667em;",[683,2673],{"className":2674,"style":970},[760],[683,2676,2559],{"className":2677},[974],[683,2679],{"className":2680,"style":2671},[760],[683,2682],{"className":2683,"style":970},[760],[683,2685,2687,2690,2693,2696,2699,2702,2705,2708,2711,2714,2717,2720,2723,2726],{"className":2686},[735],[683,2688],{"className":2689,"style":740},[739],[683,2691,1338],{"className":2692,"style":1374},[744,745],[683,2694,709],{"className":2695},[749],[683,2697,1506],{"className":2698},[744],[683,2700,722],{"className":2701},[769],[683,2703,716],{"className":2704},[756],[683,2706,2574],{"className":2707},[760],[683,2709],{"className":2710,"style":761},[760],[683,2712,1338],{"className":2713,"style":1374},[744,745],[683,2715],{"className":2716,"style":2671},[760],[683,2718],{"className":2719,"style":970},[760],[683,2721,2559],{"className":2722},[974],[683,2724],{"className":2725,"style":2671},[760],[683,2727],{"className":2728,"style":970},[760],[683,2730,2732,2735,2738,2741,2744,2747,2750,2753,2756,2759,2762,2765,2768,2771],{"className":2731},[735],[683,2733],{"className":2734,"style":740},[739],[683,2736,1343],{"className":2737,"style":1384},[744,745],[683,2739,709],{"className":2740},[749],[683,2742,676],{"className":2743},[744],[683,2745,722],{"className":2746},[769],[683,2748,716],{"className":2749},[756],[683,2751,2574],{"className":2752},[760],[683,2754],{"className":2755,"style":761},[760],[683,2757,1333],{"className":2758},[744,745],[683,2760],{"className":2761,"style":2671},[760],[683,2763],{"className":2764,"style":970},[760],[683,2766,2559],{"className":2767},[974],[683,2769],{"className":2770,"style":2671},[760],[683,2772],{"className":2773,"style":970},[760],[683,2775,2777,2780,2783,2786,2789,2792,2795,2798,2801,2804,2807,2810,2813,2816],{"className":2776},[735],[683,2778],{"className":2779,"style":740},[739],[683,2781,1343],{"className":2782,"style":1384},[744,745],[683,2784,709],{"className":2785},[749],[683,2787,1973],{"className":2788},[744],[683,2790,722],{"className":2791},[769],[683,2793,716],{"className":2794},[756],[683,2796,2574],{"className":2797},[760],[683,2799],{"className":2800,"style":761},[760],[683,2802,1343],{"className":2803,"style":1384},[744,745],[683,2805],{"className":2806,"style":2671},[760],[683,2808],{"className":2809,"style":970},[760],[683,2811,2559],{"className":2812},[974],[683,2814],{"className":2815,"style":2671},[760],[683,2817],{"className":2818,"style":970},[760],[683,2820,2822,2825,2828,2831,2834,2837,2840,2843,2846,2849,2852,2855,2858,2861],{"className":2821},[735],[683,2823],{"className":2824,"style":740},[739],[683,2826,1348],{"className":2827,"style":1394},[744,745],[683,2829,709],{"className":2830},[749],[683,2832,1625],{"className":2833},[744],[683,2835,722],{"className":2836},[769],[683,2838,716],{"className":2839},[756],[683,2841,2574],{"className":2842},[760],[683,2844],{"className":2845,"style":761},[760],[683,2847,1338],{"className":2848,"style":1374},[744,745],[683,2850],{"className":2851,"style":2671},[760],[683,2853],{"className":2854,"style":970},[760],[683,2856,2559],{"className":2857},[974],[683,2859],{"className":2860,"style":2671},[760],[683,2862],{"className":2863,"style":970},[760],[683,2865,2867,2870,2873,2876,2879],{"className":2866},[735],[683,2868],{"className":2869,"style":740},[739],[683,2871,1348],{"className":2872,"style":1394},[744,745],[683,2874,709],{"className":2875},[749],[683,2877,2649],{"className":2878},[744],[683,2880,722],{"className":2881},[769],".\nDepuis ",[683,2884,2886,2899],{"className":2885},[686],[683,2887,2889],{"className":2888},[690],[692,2890,2891],{"xmlns":694},[696,2892,2893,2897],{},[699,2894,2895],{},[702,2896,1333],{},[724,2898,1333],{"encoding":726},[683,2900,2902],{"className":2901,"ariaHidden":715},[731],[683,2903,2905,2908],{"className":2904},[735],[683,2906],{"className":2907,"style":863},[739],[683,2909,1333],{"className":2910},[744,745]," : ",[683,2913,2915,2928],{"className":2914},[686],[683,2916,2918],{"className":2917},[690],[692,2919,2920],{"xmlns":694},[696,2921,2922,2926],{},[699,2923,2924],{},[702,2925,1338],{},[724,2927,1338],{"encoding":726},[683,2929,2931],{"className":2930,"ariaHidden":715},[731],[683,2932,2934,2937],{"className":2933},[735],[683,2935],{"className":2936,"style":863},[739],[683,2938,1338],{"className":2939,"style":1374},[744,745]," via ",[683,2942,2944,2966],{"className":2943},[686],[683,2945,2947],{"className":2946},[690],[692,2948,2949],{"xmlns":694},[696,2950,2951,2963],{},[699,2952,2953,2955,2957,2959,2961],{},[702,2954,1333],{},[1131,2956,2556],{},[706,2958,1539],{},[1131,2960,2556],{},[702,2962,1338],{},[724,2964,2965],{"encoding":726},"A\\!\\to\\!B",[683,2967,2969,2993],{"className":2968,"ariaHidden":715},[731],[683,2970,2972,2975,2978,2981,2984,2987,2990],{"className":2971},[735],[683,2973],{"className":2974,"style":863},[739],[683,2976,1333],{"className":2977},[744,745],[683,2979],{"className":2980,"style":2671},[760],[683,2982],{"className":2983,"style":1560},[760],[683,2985,1539],{"className":2986},[1564],[683,2988],{"className":2989,"style":2671},[760],[683,2991],{"className":2992,"style":1560},[760],[683,2994,2996,2999],{"className":2995},[735],[683,2997],{"className":2998,"style":863},[739],[683,3000,1338],{"className":3001,"style":1374},[744,745]," (coût 2), ",[683,3004,3006,3019],{"className":3005},[686],[683,3007,3009],{"className":3008},[690],[692,3010,3011],{"xmlns":694},[696,3012,3013,3017],{},[699,3014,3015],{},[702,3016,1343],{},[724,3018,1343],{"encoding":726},[683,3020,3022],{"className":3021,"ariaHidden":715},[731],[683,3023,3025,3028],{"className":3024},[735],[683,3026],{"className":3027,"style":863},[739],[683,3029,1343],{"className":3030,"style":1384},[744,745],[683,3032,3034,3064],{"className":3033},[686],[683,3035,3037],{"className":3036},[690],[692,3038,3039],{"xmlns":694},[696,3040,3041,3061],{},[699,3042,3043,3045,3047,3049,3051,3053,3055,3057,3059],{},[702,3044,1333],{},[1131,3046,2556],{},[706,3048,1539],{},[1131,3050,2556],{},[702,3052,1338],{},[1131,3054,2556],{},[706,3056,1539],{},[1131,3058,2556],{},[702,3060,1343],{},[724,3062,3063],{"encoding":726},"A\\!\\to\\!B\\!\\to\\!C",[683,3065,3067,3091,3115],{"className":3066,"ariaHidden":715},[731],[683,3068,3070,3073,3076,3079,3082,3085,3088],{"className":3069},[735],[683,3071],{"className":3072,"style":863},[739],[683,3074,1333],{"className":3075},[744,745],[683,3077],{"className":3078,"style":2671},[760],[683,3080],{"className":3081,"style":1560},[760],[683,3083,1539],{"className":3084},[1564],[683,3086],{"className":3087,"style":2671},[760],[683,3089],{"className":3090,"style":1560},[760],[683,3092,3094,3097,3100,3103,3106,3109,3112],{"className":3093},[735],[683,3095],{"className":3096,"style":863},[739],[683,3098,1338],{"className":3099,"style":1374},[744,745],[683,3101],{"className":3102,"style":2671},[760],[683,3104],{"className":3105,"style":1560},[760],[683,3107,1539],{"className":3108},[1564],[683,3110],{"className":3111,"style":2671},[760],[683,3113],{"className":3114,"style":1560},[760],[683,3116,3118,3121],{"className":3117},[735],[683,3119],{"className":3120,"style":863},[739],[683,3122,1343],{"className":3123,"style":1384},[744,745],"\n(coût 3), ",[683,3126,3128,3141],{"className":3127},[686],[683,3129,3131],{"className":3130},[690],[692,3132,3133],{"xmlns":694},[696,3134,3135,3139],{},[699,3136,3137],{},[702,3138,1348],{},[724,3140,1348],{"encoding":726},[683,3142,3144],{"className":3143,"ariaHidden":715},[731],[683,3145,3147,3150],{"className":3146},[735],[683,3148],{"className":3149,"style":863},[739],[683,3151,1348],{"className":3152,"style":1394},[744,745],[683,3154,3156,3194],{"className":3155},[686],[683,3157,3159],{"className":3158},[690],[692,3160,3161],{"xmlns":694},[696,3162,3163,3191],{},[699,3164,3165,3167,3169,3171,3173,3175,3177,3179,3181,3183,3185,3187,3189],{},[702,3166,1333],{},[1131,3168,2556],{},[706,3170,1539],{},[1131,3172,2556],{},[702,3174,1338],{},[1131,3176,2556],{},[706,3178,1539],{},[1131,3180,2556],{},[702,3182,1343],{},[1131,3184,2556],{},[706,3186,1539],{},[1131,3188,2556],{},[702,3190,1348],{},[724,3192,3193],{"encoding":726},"A\\!\\to\\!B\\!\\to\\!C\\!\\to\\!D",[683,3195,3197,3221,3245,3269],{"className":3196,"ariaHidden":715},[731],[683,3198,3200,3203,3206,3209,3212,3215,3218],{"className":3199},[735],[683,3201],{"className":3202,"style":863},[739],[683,3204,1333],{"className":3205},[744,745],[683,3207],{"className":3208,"style":2671},[760],[683,3210],{"className":3211,"style":1560},[760],[683,3213,1539],{"className":3214},[1564],[683,3216],{"className":3217,"style":2671},[760],[683,3219],{"className":3220,"style":1560},[760],[683,3222,3224,3227,3230,3233,3236,3239,3242],{"className":3223},[735],[683,3225],{"className":3226,"style":863},[739],[683,3228,1338],{"className":3229,"style":1374},[744,745],[683,3231],{"className":3232,"style":2671},[760],[683,3234],{"className":3235,"style":1560},[760],[683,3237,1539],{"className":3238},[1564],[683,3240],{"className":3241,"style":2671},[760],[683,3243],{"className":3244,"style":1560},[760],[683,3246,3248,3251,3254,3257,3260,3263,3266],{"className":3247},[735],[683,3249],{"className":3250,"style":863},[739],[683,3252,1343],{"className":3253,"style":1384},[744,745],[683,3255],{"className":3256,"style":2671},[760],[683,3258],{"className":3259,"style":1560},[760],[683,3261,1539],{"className":3262},[1564],[683,3264],{"className":3265,"style":2671},[760],[683,3267],{"className":3268,"style":1560},[760],[683,3270,3272,3275],{"className":3271},[735],[683,3273],{"className":3274,"style":863},[739],[683,3276,1348],{"className":3277,"style":1394},[744,745]," (coût 6).",[593,3280,3282],{"id":3281},"pièges-courants","Pièges courants",[650,3284,3285,3290,3296],{},[653,3286,3287,3288,1009],{},"Croire qu'OSPF préfère toujours la route avec le moins de sauts — non, il\nminimise le ",[602,3289,680],{},[653,3291,3292,3293,3295],{},"Oublier le plafond de ",[602,3294,2169],{}," propre à RIP.",[653,3297,3298],{},"Croire que RIP voit l'ensemble du réseau — il ne connaît que ses voisins.",{"title":1030,"searchDepth":2217,"depth":2217,"links":3300},[3301,3302,3303,3304,3305],{"id":2249,"depth":2217,"text":2250},{"id":2258,"depth":2217,"text":2259},{"id":2481,"depth":2217,"text":2482},{"id":2535,"depth":2217,"text":2536},{"id":3281,"depth":2217,"text":3282},"Mémo de révision sur les deux protocoles de routage du programme.",{},"\u002Fnsi-tale\u002Ftc-archi-os-reseaux\u002Fprotocoles-rip-ospf.memo",[],{"title":2243,"description":3306},"2.nsi-tale\u002Ftc-archi-os-reseaux\u002F5.protocoles-rip-ospf.memo","9Ac8RrQHGMNshc9uRoREHmFWexMWTE5vzrD3AHg_LQ8",{"id":3314,"title":3315,"body":3316,"description":3578,"extension":2228,"meta":3579,"navigation":2235,"path":3580,"seo":3581,"stem":3582,"__hash__":3583},"coursSlides\u002F2.nsi-tale\u002Ftc-archi-os-reseaux\u002F5.protocoles-rip-ospf.slides.md","Protocoles RIP et OSPF — diapositives",{"type":590,"value":3317,"toc":3576},[3318,3323,3326,3329,3333,3350,3352,3356,3383,3385,3389,3410,3412,3416,3422,3433,3436,3438,3442,3445,3448,3490,3492,3494,3542,3544,3548,3565,3567,3571],[3319,3320,3322],"h1",{"id":3321},"protocoles-rip-et-ospf","Protocoles RIP et OSPF",[598,3324,3325],{},"TC03 — Comment les routeurs apprennent leurs routes.",[3327,3328],"hr",{},[3319,3330,3332],{"id":3331},"le-réseau-est-un-graphe","Le réseau est un graphe",[650,3334,3335,3338,3341,3344],{},[653,3336,3337],{},"Sommets = routeurs.",[653,3339,3340],{},"Arêtes = liens directs.",[653,3342,3343],{},"Poids = nombre de sauts (RIP) ou coût (OSPF).",[653,3345,3346,3347,1009],{},"Trouver la meilleure route = ",[602,3348,3349],{},"plus court chemin",[3327,3351],{},[3319,3353,3355],{"id":3354},"rip-en-bref","RIP en bref",[650,3357,3358,3363,3369,3374,3380],{},[653,3359,3360,3361,1009],{},"Métrique : ",[602,3362,791],{},[653,3364,3365,3366,1009],{},"Chaque routeur n'échange qu'avec ses ",[602,3367,3368],{},"voisins",[653,3370,3371,3372,1009],{},"Algorithme : ",[602,3373,2105],{},[653,3375,3376,3377,1009],{},"Plafond : ",[602,3378,3379],{},"15 sauts maximum",[653,3381,3382],{},"Limites : convergence lente, métrique grossière.",[3327,3384],{},[3319,3386,3388],{"id":3387},"ospf-en-bref","OSPF en bref",[650,3390,3391,3396,3402,3407],{},[653,3392,3360,3393,3395],{},[602,3394,680],{}," numérique par lien.",[653,3397,3398,3399,3401],{},"Chaque routeur connaît la ",[602,3400,1075],{}," du réseau.",[653,3403,3371,3404,3406],{},[602,3405,2108],{},", appliqué localement.",[653,3408,3409],{},"Échelle : grands réseaux.",[3327,3411],{},[3319,3413,3415],{"id":3414},"lien-avec-les-graphes","Lien avec les graphes",[598,3417,3418,3419,1009],{},"OSPF = ",[602,3420,3421],{},"application industrielle de Dijkstra",[650,3423,3424,3427,3430],{},[653,3425,3426],{},"Le routeur reconstruit le graphe pondéré.",[653,3428,3429],{},"Il calcule les plus courts chemins vers chaque destination.",[653,3431,3432],{},"Le résultat alimente la table de routage.",[598,3434,3435],{},"(Cf. chapitre TE — algorithmes sur graphes.)",[3327,3437],{},[3319,3439,3441],{"id":3440},"exemple-chiffré","Exemple chiffré",[1397,3443],{"alt":3444,"kind":1400,"src":1401,"svg":1402},"Graphe OSPF d'exemple",[598,3446,3447],{},"Depuis A :",[1436,3449,3450,3461],{},[1439,3451,3452],{},[1442,3453,3454,3457,3459],{},[1445,3455,3456],{},"Cible",[1445,3458,2506],{},[1445,3460,1453],{},[1455,3462,3463,3472,3481],{},[1442,3464,3465,3467,3469],{},[1460,3466,1338],{},[1460,3468,1506],{},[1460,3470,3471],{},"A→B",[1442,3473,3474,3476,3478],{},[1460,3475,1343],{},[1460,3477,1625],{},[1460,3479,3480],{},"A→B→C",[1442,3482,3483,3485,3487],{},[1460,3484,1348],{},[1460,3486,1763],{},[1460,3488,3489],{},"A→B→C→D",[3327,3491],{},[3319,3493,2482],{"id":2481},[1436,3495,3496,3506],{},[1439,3497,3498],{},[1442,3499,3500,3502,3504],{},[1445,3501,2123],{},[1445,3503,624],{},[1445,3505,628],{},[1455,3507,3508,3516,3524,3532],{},[1442,3509,3510,3512,3514],{},[1460,3511,2134],{},[1460,3513,2503],{},[1460,3515,2506],{},[1442,3517,3518,3520,3522],{},[1460,3519,2511],{},[1460,3521,2514],{},[1460,3523,2151],{},[1442,3525,3526,3528,3530],{},[1460,3527,2156],{},[1460,3529,1003],{},[1460,3531,2108],{},[1442,3533,3534,3536,3539],{},[1460,3535,2188],{},[1460,3537,3538],{},"Petits",[1460,3540,3541],{},"Grands",[3327,3543],{},[3319,3545,3547],{"id":3546},"au-delà-du-programme","Au-delà du programme",[650,3549,3550,3556,3562],{},[653,3551,3552,3553,3555],{},"RIP et OSPF sont des ",[602,3554,2204],{}," (intra-domaine).",[653,3557,3558,3559,3561],{},"Entre opérateurs : ",[602,3560,2212],{}," (hors programme NSI).",[653,3563,3564],{},"Pour vous : retenir le lien avec les graphes.",[3327,3566],{},[3319,3568,3570],{"id":3569},"à-retenir","À retenir",[598,3572,3573],{},[602,3574,3575],{},"RIP compte les sauts à courte vue. OSPF voit la carte entière et applique\nDijkstra. La théorie des graphes irrigue Internet.",{"title":1030,"searchDepth":2217,"depth":2217,"links":3577},[],"Deck projetable pour la séance sur les protocoles de routage.",{},"\u002Fnsi-tale\u002Ftc-archi-os-reseaux\u002Fprotocoles-rip-ospf.slides",{"title":3315,"description":3578},"2.nsi-tale\u002Ftc-archi-os-reseaux\u002F5.protocoles-rip-ospf.slides","FErux3dgaDqEo9J_xkptYX_lBb1EEjQB9EX5wON8Qi4",{"id":2242,"title":2243,"bo":3585,"body":3586,"description":3306,"eval":2227,"extension":2228,"labo":2227,"meta":4598,"navigation":2235,"path":3308,"quizzes":4599,"readingTime":2238,"seo":4600,"stem":3311,"tp":2227,"__hash__":3312},[588],{"type":590,"value":3587,"toc":4591},[3588,3590,3594,3596,3802,3804,3850,3852,4577,4579],[593,3589,2250],{"id":2249},[598,3591,3592],{},[602,3593,2255],{},[593,3595,2259],{"id":2258},[650,3597,3598,3602,3612,3794,3798],{},[653,3599,2264,3600,2267],{},[602,3601,647],{},[653,3603,3604,2272,3606,2275,3608,2279,3610,1009],{},[602,3605,624],{},[602,3607,791],{},[602,3609,2278],{},[602,3611,2105],{},[653,3613,3614,2272,3616,681,3618,2345,3674,2464,3792,1009],{},[602,3615,628],{},[602,3617,680],{},[683,3619,3621,3644],{"className":3620},[686],[683,3622,3624],{"className":3623},[690],[692,3625,3626],{"xmlns":694},[696,3627,3628,3642],{},[699,3629,3630,3632,3634,3636,3638,3640],{},[702,3631,704],{},[706,3633,709],{"stretchy":708},[702,3635,712],{},[706,3637,716],{"separator":715},[702,3639,719],{},[706,3641,722],{"stretchy":708},[724,3643,2314],{"encoding":726},[683,3645,3647],{"className":3646,"ariaHidden":715},[731],[683,3648,3650,3653,3656,3659,3662,3665,3668,3671],{"className":3649},[735],[683,3651],{"className":3652,"style":740},[739],[683,3654,704],{"className":3655},[744,745],[683,3657,709],{"className":3658},[749],[683,3660,712],{"className":3661},[744,745],[683,3663,716],{"className":3664},[756],[683,3666],{"className":3667,"style":761},[760],[683,3669,719],{"className":3670,"style":765},[744,745],[683,3672,722],{"className":3673},[769],[683,3675,3677,3708],{"className":3676},[686],[683,3678,3680],{"className":3679},[690],[692,3681,3682],{"xmlns":694},[696,3683,3684,3706],{},[699,3685,3686,3692,3694],{},[1116,3687,3688,3690],{},[806,3689,1120],{},[806,3691,1123],{},[702,3693,1127],{"mathvariant":1126},[699,3695,3696,3698,3704],{},[1131,3697,1133],{},[1135,3699,3700,3702],{"accent":715},[1131,3701,1139],{},[706,3703,1142],{},[1131,3705,1145],{},[724,3707,1148],{"encoding":726},[683,3709,3711],{"className":3710,"ariaHidden":715},[731],[683,3712,3714,3717,3720,3749,3752],{"className":3713},[735],[683,3715],{"className":3716,"style":1158},[739],[683,3718,676],{"className":3719},[744],[683,3721,3723,3726],{"className":3722},[744],[683,3724,1168],{"className":3725},[744],[683,3727,3729],{"className":3728},[1172],[683,3730,3732],{"className":3731},[1176],[683,3733,3735],{"className":3734},[1180],[683,3736,3738],{"className":3737,"style":1185},[1184],[683,3739,3740,3743],{"style":1188},[683,3741],{"className":3742,"style":1193},[1192],[683,3744,3746],{"className":3745},[1197,1198,1199,1200],[683,3747,1123],{"className":3748},[744,1200],[683,3750,1127],{"className":3751},[744],[683,3753,3755,3758,3789],{"className":3754},[744,1210],[683,3756,1133],{"className":3757},[744],[683,3759,3761],{"className":3760},[744,1217],[683,3762,3764],{"className":3763},[1176],[683,3765,3767],{"className":3766},[1180],[683,3768,3770,3778],{"className":3769,"style":895},[1184],[683,3771,3772,3775],{"style":1229},[683,3773],{"className":3774,"style":1233},[1192],[683,3776,1139],{"className":3777},[744],[683,3779,3780,3783],{"style":1229},[683,3781],{"className":3782,"style":1233},[1192],[683,3784,3786],{"className":3785,"style":1246},[1245],[683,3787,1142],{"className":3788},[744],[683,3790,1145],{"className":3791},[744],[602,3793,2108],{},[653,3795,2469,3796,1009],{},[602,3797,2472],{},[653,3799,2475,3800,2478],{},[602,3801,2204],{},[593,3803,2482],{"id":2481},[1436,3805,3806,3816],{},[1439,3807,3808],{},[1442,3809,3810,3812,3814],{},[1445,3811,2123],{},[1445,3813,624],{},[1445,3815,628],{},[1455,3817,3818,3826,3834,3842],{},[1442,3819,3820,3822,3824],{},[1460,3821,2134],{},[1460,3823,2503],{},[1460,3825,2506],{},[1442,3827,3828,3830,3832],{},[1460,3829,2511],{},[1460,3831,2514],{},[1460,3833,2151],{},[1442,3835,3836,3838,3840],{},[1460,3837,2156],{},[1460,3839,2105],{},[1460,3841,2108],{},[1442,3843,3844,3846,3848],{},[1460,3845,2188],{},[1460,3847,2191],{},[1460,3849,2194],{},[593,3851,2536],{"id":2535},[598,3853,2539,3854,2882,4189,2911,4217,2940,4245,3002,4305,2940,4333,3124,4425,2940,4453,3278],{},[683,3855,3857,3964],{"className":3856},[686],[683,3858,3860],{"className":3859},[690],[692,3861,3862],{"xmlns":694},[696,3863,3864,3962],{},[699,3865,3866,3868,3870,3872,3874,3876,3878,3880,3882,3884,3886,3888,3890,3892,3894,3896,3898,3900,3902,3904,3906,3908,3910,3912,3914,3916,3918,3920,3922,3924,3926,3928,3930,3932,3934,3936,3938,3940,3942,3944,3946,3948,3950,3952,3954,3956,3958,3960],{},[702,3867,1333],{},[1131,3869,2556],{},[706,3871,2559],{},[1131,3873,2556],{},[702,3875,1338],{},[706,3877,709],{"stretchy":708},[806,3879,1506],{},[706,3881,722],{"stretchy":708},[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