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sociaux","\u002Fsnt-2nde\u002Fsc-reseaux-sociaux","0.snt-2nde\u002Fsc-reseaux-sociaux\u002F0.index",[71,72,76,80,84,88],{"title":67,"path":68,"stem":69},{"title":73,"path":74,"stem":75},"Panorama des réseaux sociaux","\u002Fsnt-2nde\u002Fsc-reseaux-sociaux\u002Fpanorama-rs","0.snt-2nde\u002Fsc-reseaux-sociaux\u002F1.panorama-rs",{"title":77,"path":78,"stem":79},"Identité numérique et authentification","\u002Fsnt-2nde\u002Fsc-reseaux-sociaux\u002Fidentite-numerique","0.snt-2nde\u002Fsc-reseaux-sociaux\u002F2.identite-numerique",{"title":81,"path":82,"stem":83},"Le modèle économique des réseaux sociaux","\u002Fsnt-2nde\u002Fsc-reseaux-sociaux\u002Fmodele-economique","0.snt-2nde\u002Fsc-reseaux-sociaux\u002F3.modele-economique",{"title":85,"path":86,"stem":87},"Petit monde et graphes","\u002Fsnt-2nde\u002Fsc-reseaux-sociaux\u002Fpetit-monde-graphes","0.snt-2nde\u002Fsc-reseaux-sociaux\u002F4.petit-monde-graphes",{"title":89,"path":90,"stem":91},"La cyberviolence","\u002Fsnt-2nde\u002Fsc-reseaux-sociaux\u002Fcyberviolence","0.snt-2nde\u002Fsc-reseaux-sociaux\u002F5.cyberviolence",{"title":93,"path":94,"stem":95,"children":96},"Les données structurées et leur traitement","\u002Fsnt-2nde\u002Fsd-donnees-structurees","0.snt-2nde\u002Fsd-donnees-structurees\u002F0.index",[97,98,102,106,110,114],{"title":93,"path":94,"stem":95},{"title":99,"path":100,"stem":101},"Données et formats","\u002Fsnt-2nde\u002Fsd-donnees-structurees\u002Fdonnees-formats","0.snt-2nde\u002Fsd-donnees-structurees\u002F1.donnees-formats",{"title":103,"path":104,"stem":105},"Données structurées","\u002Fsnt-2nde\u002Fsd-donnees-structurees\u002Fdonnees-structurees","0.snt-2nde\u002Fsd-donnees-structurees\u002F2.donnees-structurees",{"title":107,"path":108,"stem":109},"Métadonnées","\u002Fsnt-2nde\u002Fsd-donnees-structurees\u002Fmetadonnees","0.snt-2nde\u002Fsd-donnees-structurees\u002F3.metadonnees",{"title":111,"path":112,"stem":113},"Traitement de tables","\u002Fsnt-2nde\u002Fsd-donnees-structurees\u002Ftraitement-tables","0.snt-2nde\u002Fsd-donnees-structurees\u002F4.traitement-tables",{"title":115,"path":116,"stem":117},"Le cloud","\u002Fsnt-2nde\u002Fsd-donnees-structurees\u002Fcloud","0.snt-2nde\u002Fsd-donnees-structurees\u002F5.cloud",{"title":119,"path":120,"stem":121,"children":122},"Localisation, cartographie et mobilité","\u002Fsnt-2nde\u002Fse-localisation-cartographie","0.snt-2nde\u002Fse-localisation-cartographie\u002F0.index",[123,124,128,132,136,140],{"title":119,"path":120,"stem":121},{"title":125,"path":126,"stem":127},"GPS et Galileo — se situer grâce aux satellites","\u002Fsnt-2nde\u002Fse-localisation-cartographie\u002Fgps-galileo","0.snt-2nde\u002Fse-localisation-cartographie\u002F1.gps-galileo",{"title":129,"path":130,"stem":131},"Décoder une trame NMEA","\u002Fsnt-2nde\u002Fse-localisation-cartographie\u002Ftrame-nmea","0.snt-2nde\u002Fse-localisation-cartographie\u002F2.trame-nmea",{"title":133,"path":134,"stem":135},"Cartes numériques — GeoPortail et OpenStreetMap","\u002Fsnt-2nde\u002Fse-localisation-cartographie\u002Fcartes-numeriques","0.snt-2nde\u002Fse-localisation-cartographie\u002F3.cartes-numeriques",{"title":137,"path":138,"stem":139},"Itinéraires et graphes","\u002Fsnt-2nde\u002Fse-localisation-cartographie\u002Fitineraires-graphes","0.snt-2nde\u002Fse-localisation-cartographie\u002F4.itineraires-graphes",{"title":141,"path":142,"stem":143},"Confidentialité de la 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 — Première","\u002Fnsi-1ere","1.nsi-1ere\u002F0.index",[229,230,234,256,282,304,328,354,380,410],{"title":225,"path":226,"stem":227},{"title":231,"path":232,"stem":233},"Relecture pédagogique — 8 chapitres NSI 1ère (PA → PH)","\u002Fnsi-1ere\u002Freview","1.nsi-1ere\u002FREVIEW",{"title":235,"path":236,"stem":237,"children":238},"Histoire de l'informatique","\u002Fnsi-1ere\u002Fpa-histoire-info","1.nsi-1ere\u002Fpa-histoire-info\u002F0.index",[239,240,244,248,252],{"title":235,"path":236,"stem":237},{"title":241,"path":242,"stem":243},"De la préantiquité aux machines à calculer","\u002Fnsi-1ere\u002Fpa-histoire-info\u002Fpreantiquite-aux-machines","1.nsi-1ere\u002Fpa-histoire-info\u002F1.preantiquite-aux-machines",{"title":245,"path":246,"stem":247},"La machine universelle (1930-1950)","\u002Fnsi-1ere\u002Fpa-histoire-info\u002Fmachine-universelle","1.nsi-1ere\u002Fpa-histoire-info\u002F2.machine-universelle",{"title":249,"path":250,"stem":251},"Les ordinateurs modernes (1947-1990)","\u002Fnsi-1ere\u002Fpa-histoire-info\u002Fordinateurs-modernes","1.nsi-1ere\u002Fpa-histoire-info\u002F3.ordinateurs-modernes",{"title":253,"path":254,"stem":255},"Réseaux, Web et IA (1969 à aujourd'hui)","\u002Fnsi-1ere\u002Fpa-histoire-info\u002Freseaux-et-web","1.nsi-1ere\u002Fpa-histoire-info\u002F4.reseaux-et-web",{"title":257,"path":258,"stem":259,"children":260},"Représentation des données — types et valeurs","\u002Fnsi-1ere\u002Fpb-types-valeurs","1.nsi-1ere\u002Fpb-types-valeurs\u002F0.index",[261,262,266,270,274,278],{"title":257,"path":258,"stem":259},{"title":263,"path":264,"stem":265},"Bases de numération et entiers positifs","\u002Fnsi-1ere\u002Fpb-types-valeurs\u002Fbases-entiers-positifs","1.nsi-1ere\u002Fpb-types-valeurs\u002F1.bases-entiers-positifs",{"title":267,"path":268,"stem":269},"Entiers relatifs et complément à 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":25,"bo":587,"body":589,"description":1134,"eval":1135,"extension":1136,"labo":1135,"meta":1137,"navigation":1138,"path":26,"quizzes":1139,"readingTime":1146,"seo":1147,"stem":27,"tp":1135,"__hash__":1148},"cours\u002F0.snt-2nde\u002Fsa-internet\u002F2.reseaux-physiques.md",[588],"SA02",{"type":590,"value":591,"toc":1124},"minimark",[592,597,610,613,617,624,634,638,641,750,757,780,809,813,820,825,839,843,854,865,1038,1045,1064,1088,1092,1103,1113,1117],[593,594,596],"h2",{"id":595},"introduction","Introduction",[598,599,600,601,605,606,609],"p",{},"Quand vous regardez une vidéo sur votre téléphone, les données passent par les\nondes du réseau mobile, peut-être par le Wi-Fi de votre maison, puis empruntent\ndes câbles enterrés, traversent des routeurs, et finissent parfois par franchir\nun océan via une fibre sous-marine. Internet ",[602,603,604],"strong",{},"n'est pas"," un câble, ni une\nantenne, ni un satellite : c'est un ",[602,607,608],{},"réseau de réseaux"," qui s'appuie sur des\nsupports physiques très divers, et qui fonctionne quel que soit le support.",[611,612],"bo-ref",{"code":588},[593,614,616],{"id":615},"internet-est-un-réseau-logique","Internet est un réseau logique",[598,618,619,620,623],{},"Une analogie utile : Internet est comme le ",[602,621,622],{},"réseau routier mondial",". Vous\npouvez vous déplacer d'un point à un autre via des autoroutes, des routes\nsecondaires, des chemins de campagne, parfois un ferry. La destination est\nla même ; les moyens de la rejoindre varient. Internet fonctionne de la même\nfaçon : la donnée part d'un point A et arrive à un point B, peu importe les\nsupports physiques empruntés sur le trajet.",[625,626,627],"note",{},[598,628,629,630,633],{},"Internet est défini par les ",[602,631,632],{},"protocoles"," qui régissent les échanges\n(TCP, IP — vous les verrez au cours suivant), pas par un support matériel\nparticulier. C'est ce qui le rend si flexible.",[593,635,637],{"id":636},"les-principaux-supports-physiques","Les principaux supports physiques",[598,639,640],{},"Voici les supports les plus courants aujourd'hui, classés grossièrement par\ndébit et par usage :",[642,643,644,663],"table",{},[645,646,647],"thead",{},[648,649,650,654,657,660],"tr",{},[651,652,653],"th",{},"Support",[651,655,656],{},"Type",[651,658,659],{},"Débit typique",[651,661,662],{},"Usage typique",[664,665,666,681,694,708,722,736],"tbody",{},[648,667,668,672,675,678],{},[669,670,671],"td",{},"Câble Ethernet (cuivre)",[669,673,674],{},"filaire",[669,676,677],{},"100 Mbit\u002Fs à 10 Gbit\u002Fs",[669,679,680],{},"réseau local (lycée, maison)",[648,682,683,686,688,691],{},[669,684,685],{},"Fibre optique",[669,687,674],{},[669,689,690],{},"100 Mbit\u002Fs à plusieurs Gbit\u002Fs",[669,692,693],{},"accès Internet, dorsales",[648,695,696,699,702,705],{},[669,697,698],{},"Wi-Fi",[669,700,701],{},"sans fil",[669,703,704],{},"50 à 1 000 Mbit\u002Fs",[669,706,707],{},"accès local sans fil",[648,709,710,713,716,719],{},[669,711,712],{},"4G \u002F 5G",[669,714,715],{},"sans fil mobile",[669,717,718],{},"50 Mbit\u002Fs à 1 Gbit\u002Fs",[669,720,721],{},"Internet mobile",[648,723,724,727,730,733],{},[669,725,726],{},"Satellite",[669,728,729],{},"sans fil longue portée",[669,731,732],{},"25 à 200 Mbit\u002Fs",[669,734,735],{},"zones isolées, mer, avion",[648,737,738,741,744,747],{},[669,739,740],{},"ADSL (cuivre téléphonique)",[669,742,743],{},"filaire (obsolète)",[669,745,746],{},"1 à 20 Mbit\u002Fs",[669,748,749],{},"encore présent en milieu rural",[598,751,752,753,756],{},"L'unité ",[602,754,755],{},"bit par seconde"," (bit\u002Fs, ou b\u002Fs) mesure le débit, c'est-à-dire la\nquantité d'information transportée par seconde. Mille bits, c'est un kilobit\n(Kbit\u002Fs) ; un million, un mégabit (Mbit\u002Fs) ; un milliard, un gigabit (Gbit\u002Fs).",[758,759,760],"warning",{},[598,761,762,763,766,767,771,772,775,776,779],{},"Attention à ne pas confondre ",[602,764,765],{},"bit"," (l'unité du débit, écrite avec un petit ",[768,769,770],"code",{},"b",")\net ",[602,773,774],{},"octet"," (8 bits, écrit avec un grand ",[768,777,778],{},"B","). Une connexion à 100 Mbit\u002Fs\ntransmet environ 12,5 Mo (méga-octets) par seconde — huit fois moins.",[781,782,785,792],"self-eval-qcm",{"correct":783,"slug":784},"1","reseaux-physiques-c1",[786,787,789],"template",{"v-slot:question":788},"",[598,790,791],{},"Lequel de ces supports est sans fil ?",[786,793,794],{"v-slot:choices":788},[795,796,797,801,803,806],"ul",{},[798,799,800],"li",{},"fibre optique",[798,802,698],{},[798,804,805],{},"câble Ethernet",[798,807,808],{},"ADSL",[593,810,812],{"id":811},"filaire-ou-sans-fil-pas-la-même-histoire","Filaire ou sans fil : pas la même histoire",[598,814,815,816,819],{},"Les supports ",[602,817,818],{},"filaires"," (cuivre, fibre) sont en général plus rapides, plus\nfiables et moins sensibles aux perturbations. Mais ils nécessitent une\ninfrastructure lourde : creuser des tranchées, poser des câbles.",[598,821,815,822,824],{},[602,823,701],{}," (Wi-Fi, 4G, satellite) offrent la mobilité et le\ndéploiement rapide, au prix d'un débit plus variable, d'une latence parfois\nplus élevée, et d'une sensibilité aux obstacles (murs, météo, distance à\nl'antenne).",[826,827,828],"tip",{},[598,829,830,831,834,835,838],{},"Les ",[602,832,833],{},"dorsales"," d'Internet — les grands axes de communication intercontinentaux —\nsont presque exclusivement constituées de ",[602,836,837],{},"fibres optiques",", souvent\nsous-marines. Plusieurs centaines de câbles relient ainsi les continents au\nfond des océans.",[593,840,842],{"id":841},"lévolution-du-trafic-mondial","L'évolution du trafic mondial",[598,844,845,846,849,850,853],{},"Le ",[602,847,848],{},"trafic Internet"," désigne le volume total de données transitant sur le\nréseau. Il a connu une croissance spectaculaire ces dernières décennies :\n",[602,851,852],{},"le trafic mondial double tous les deux à trois ans"," depuis le début des\nannées 2000, et la tendance continue.",[598,855,856,857,860,861,864],{},"Pour donner un repère concret, deux chiffres et une division. Le trafic mondial\nvaut aujourd'hui environ ",[602,858,859],{},"150 téraoctets par seconde",", et une heure de vidéo\nen haute définition pèse environ ",[602,862,863],{},"2,5 gigaoctets",". Donc :",[866,867,870],"span",{"className":868},[869],"katex-display",[866,871,874,938],{"className":872},[873],"katex",[866,875,878],{"className":876},[877],"katex-mathml",[879,880,883],"math",{"xmlns":881,"display":882},"http:\u002F\u002Fwww.w3.org\u002F1998\u002FMath\u002FMathML","block",[884,885,886,933],"semantics",{},[887,888,889,893,897,900,903,907,910,914,917,920,923,926,928,930],"mrow",{},[890,891,892],"mn",{},"150",[894,895,896],"mtext",{}," ",[890,898,899],{},"000",[894,901,902],{}," Go\u002Fs",[904,905,906],"mo",{},"÷",[890,908,909],{},"2",[904,911,913],{"separator":912},"true",",",[890,915,916],{},"5",[894,918,919],{}," Go\u002Fh",[904,921,922],{},"≈",[890,924,925],{},"60",[894,927,896],{},[890,929,899],{},[894,931,932],{}," heures\u002Fs",[934,935,937],"annotation",{"encoding":936},"application\u002Fx-tex","150\\,000 \\text{ Go\u002Fs} \\div 2,5 \\text{ Go\u002Fh} \\approx 60\\,000 \\text{ heures\u002Fs}",[866,939,942,981,1017],{"className":940,"ariaHidden":912},[941],"katex-html",[866,943,946,951,955,960,963,970,974,978],{"className":944},[945],"base",[866,947],{"className":948,"style":950},[949],"strut","height:1em;vertical-align:-0.25em;",[866,952,892],{"className":953},[954],"mord",[866,956],{"className":957,"style":959},[958],"mspace","margin-right:0.1667em;",[866,961,899],{"className":962},[954],[866,964,967],{"className":965},[954,966],"text",[866,968,902],{"className":969},[954],[866,971],{"className":972,"style":973},[958],"margin-right:0.2222em;",[866,975,906],{"className":976},[977],"mbin",[866,979],{"className":980,"style":973},[958],[866,982,984,987,990,994,997,1000,1006,1010,1014],{"className":983},[945],[866,985],{"className":986,"style":950},[949],[866,988,909],{"className":989},[954],[866,991,913],{"className":992},[993],"mpunct",[866,995],{"className":996,"style":959},[958],[866,998,916],{"className":999},[954],[866,1001,1003],{"className":1002},[954,966],[866,1004,919],{"className":1005},[954],[866,1007],{"className":1008,"style":1009},[958],"margin-right:0.2778em;",[866,1011,922],{"className":1012},[1013],"mrel",[866,1015],{"className":1016,"style":1009},[958],[866,1018,1020,1023,1026,1029,1032],{"className":1019},[945],[866,1021],{"className":1022,"style":950},[949],[866,1024,925],{"className":1025},[954],[866,1027],{"className":1028,"style":959},[958],[866,1030,899],{"className":1031},[954],[866,1033,1035],{"className":1034},[954,966],[866,1036,932],{"className":1037},[954],[598,1039,1040,1041,1044],{},"Soit près de ",[602,1042,1043],{},"sept ans de vidéo… chaque seconde",". Retiens la méthode plutôt\nque le résultat : les deux chiffres d'entrée vieillissent, la division non.",[598,1046,1047,1048,1051,1052,1055,1056,1059,1060,1063],{},"Cette croissance est portée par la ",[602,1049,1050],{},"vidéo en streaming"," (Netflix, YouTube,\nTikTok), les ",[602,1053,1054],{},"visioconférences",", le ",[602,1057,1058],{},"cloud"," et les ",[602,1061,1062],{},"objets connectés",". Une\nseule heure de vidéo en haute définition consomme entre 1 et 3 gigaoctets — multiplié\npar des milliards d'utilisateurs, l'ordre de grandeur devient vite vertigineux.",[781,1065,1067,1072],{"correct":783,"slug":1066},"reseaux-physiques-c2",[786,1068,1069],{"v-slot:question":788},[598,1070,1071],{},"Quel usage contribue le plus à la croissance du trafic Internet aujourd'hui ?",[786,1073,1074],{"v-slot:choices":788},[795,1075,1076,1079,1082,1085],{},[798,1077,1078],{},"les courriels",[798,1080,1081],{},"la vidéo en streaming",[798,1083,1084],{},"la navigation web textuelle",[798,1086,1087],{},"les jeux de cartes",[593,1089,1091],{"id":1090},"pourquoi-cette-indépendance-est-précieuse","Pourquoi cette indépendance est précieuse",[598,1093,1094,1095,1098,1099,1102],{},"Si Internet dépendait d'un seul support physique, il serait extrêmement\nfragile : la moindre coupure de câble suffirait à isoler un pays. Au contraire,\nl'",[602,1096,1097],{},"indépendance par rapport au matériel"," garantit la ",[602,1100,1101],{},"résilience"," : si une\nliaison tombe, les paquets peuvent emprunter un autre chemin sur un autre\nsupport. Cette propriété, voulue dès la conception d'Internet (à l'origine, un\nprojet de recherche financé par la DARPA dans les années 1960), explique en\ngrande partie sa robustesse actuelle.",[1104,1105,1106],"caution",{},[598,1107,1108,1109,1112],{},"Cette résilience n'est ",[602,1110,1111],{},"pas"," absolue. Les câbles sous-marins peuvent être\nendommagés (chalutiers, séismes, sabotages), les routeurs critiques peuvent\nêtre saturés, et certains pays peuvent restreindre l'accès à Internet sur leur\nterritoire. Mais la décentralisation rend une coupure totale et durable\ndifficile à provoquer.",[593,1114,1116],{"id":1115},"pour-aller-plus-loin","Pour aller plus loin",[598,1118,1119,1120,1123],{},"Au-delà des supports terrestres, des entreprises déploient désormais des\nconstellations de ",[602,1121,1122],{},"satellites en orbite basse"," (Starlink, OneWeb) pour fournir\nun accès Internet aux zones que la fibre n'atteindra jamais. Ces déploiements\nillustrent une fois encore la souplesse du modèle : on ajoute un nouveau type de\nsupport, et Internet l'absorbe sans modification de sa structure logique.",{"title":788,"searchDepth":1125,"depth":1125,"links":1126},2,[1127,1128,1129,1130,1131,1132,1133],{"id":595,"depth":1125,"text":596},{"id":615,"depth":1125,"text":616},{"id":636,"depth":1125,"text":637},{"id":811,"depth":1125,"text":812},{"id":841,"depth":1125,"text":842},{"id":1090,"depth":1125,"text":1091},{"id":1115,"depth":1125,"text":1116},"Internet est un réseau logique, indépendant des supports qui le portent — fibre, cuivre, ondes, satellites.",null,"md",{},true,[1140,1144],{"slug":784,"kind":1141,"question":791,"choices":1142,"correct":783,"multi":1143,"explanation":788},"qcm",[800,698,805,808],false,{"slug":1066,"kind":1141,"question":1071,"choices":1145,"correct":783,"multi":1143,"explanation":788},[1078,1081,1084,1087],1,{"title":25,"description":1134},"fd8iJTowXqfUZeXNOXlnBk56EsLXqEP2e9AW-f1GClQ",{"id":1150,"title":1151,"bo":1152,"body":1153,"description":1545,"eval":1135,"extension":1136,"labo":1135,"meta":1546,"navigation":1143,"path":1547,"quizzes":1548,"readingTime":1146,"seo":1549,"stem":1550,"tp":1135,"__hash__":1551},"coursMemo\u002F0.snt-2nde\u002Fsa-internet\u002F2.reseaux-physiques.memo.md","Internet et les réseaux physiques — l'essentiel",[588],{"type":590,"value":1154,"toc":1538},[1155,1159,1170,1174,1336,1340,1412,1416,1513,1517],[593,1156,1158],{"id":1157},"en-une-phrase","En une phrase",[598,1160,1161,1162,1165,1166,1169],{},"Internet est un ",[602,1163,1164],{},"réseau logique"," qui circule indifféremment sur des supports\nphysiques variés — fibre, cuivre, ondes, satellites — ce qui le rend ",[602,1167,1168],{},"flexible\net résilient",".",[593,1171,1173],{"id":1172},"à-mémoriser","À mémoriser",[795,1175,1176,1182,1185,1188,1194,1330],{},[798,1177,1178,1179,1181],{},"Internet est défini par ses ",[602,1180,632],{}," (TCP\u002FIP), pas par un support.",[798,1183,1184],{},"Supports filaires : Ethernet (cuivre), fibre optique, ADSL (en déclin).",[798,1186,1187],{},"Supports sans fil : Wi-Fi, 4G\u002F5G, satellite.",[798,1189,1190,1193],{},[602,1191,1192],{},"Débit"," mesuré en bit\u002Fs, Kbit\u002Fs, Mbit\u002Fs, Gbit\u002Fs.",[798,1195,1196,1225,1226,1272,1273,1329],{},[866,1197,1199,1212],{"className":1198},[873],[866,1200,1202],{"className":1201},[877],[879,1203,1204],{"xmlns":881},[884,1205,1206,1210],{},[887,1207,1208],{},[890,1209,783],{},[934,1211,783],{"encoding":936},[866,1213,1215],{"className":1214,"ariaHidden":912},[941],[866,1216,1218,1222],{"className":1217},[945],[866,1219],{"className":1220,"style":1221},[949],"height:0.6444em;",[866,1223,783],{"className":1224},[954]," octet ",[866,1227,1229,1247],{"className":1228},[873],[866,1230,1232],{"className":1231},[877],[879,1233,1234],{"xmlns":881},[884,1235,1236,1244],{},[887,1237,1238,1241],{},[904,1239,1240],{},"=",[890,1242,1243],{},"8",[934,1245,1246],{"encoding":936},"= 8",[866,1248,1250,1263],{"className":1249,"ariaHidden":912},[941],[866,1251,1253,1257,1260],{"className":1252},[945],[866,1254],{"className":1255,"style":1256},[949],"height:0.3669em;",[866,1258,1240],{"className":1259},[1013],[866,1261],{"className":1262,"style":1009},[958],[866,1264,1266,1269],{"className":1265},[945],[866,1267],{"className":1268,"style":1221},[949],[866,1270,1243],{"className":1271},[954]," bits. Une connexion 100 Mbit\u002Fs ",[866,1274,1276,1293],{"className":1275},[873],[866,1277,1279],{"className":1278},[877],[879,1280,1281],{"xmlns":881},[884,1282,1283,1290],{},[887,1284,1285,1287],{},[904,1286,922],{},[890,1288,1289],{},"12,5",[934,1291,1292],{"encoding":936},"\\approx 12{,}5",[866,1294,1296,1309],{"className":1295,"ariaHidden":912},[941],[866,1297,1299,1303,1306],{"className":1298},[945],[866,1300],{"className":1301,"style":1302},[949],"height:0.4831em;",[866,1304,922],{"className":1305},[1013],[866,1307],{"className":1308,"style":1009},[958],[866,1310,1312,1316,1320,1326],{"className":1311},[945],[866,1313],{"className":1314,"style":1315},[949],"height:0.8389em;vertical-align:-0.1944em;",[866,1317,1319],{"className":1318},[954],"12",[866,1321,1323],{"className":1322},[954],[866,1324,913],{"className":1325},[993],[866,1327,916],{"className":1328},[954]," Mo\u002Fs.",[798,1331,845,1332,1335],{},[602,1333,1334],{},"trafic Internet mondial double tous les 2 à 3 ans",", porté\nprincipalement par la vidéo en streaming.",[593,1337,1339],{"id":1338},"à-savoir-reconnaître","À savoir reconnaître",[642,1341,1342,1355],{},[645,1343,1344],{},[648,1345,1346,1349,1352],{},[651,1347,1348],{},"Type de support",[651,1350,1351],{},"Filaire \u002F sans fil",[651,1353,1354],{},"Vitesse typique",[664,1356,1357,1366,1376,1385,1395,1403],{},[648,1358,1359,1361,1363],{},[669,1360,685],{},[669,1362,674],{},[669,1364,1365],{},"très élevée (Gbit\u002Fs)",[648,1367,1368,1371,1373],{},[669,1369,1370],{},"Ethernet cuivre",[669,1372,674],{},[669,1374,1375],{},"élevée (100 Mbit\u002Fs – 10 Gbit\u002Fs)",[648,1377,1378,1380,1382],{},[669,1379,808],{},[669,1381,743],{},[669,1383,1384],{},"faible (qq Mbit\u002Fs)",[648,1386,1387,1389,1392],{},[669,1388,698],{},[669,1390,1391],{},"sans fil local",[669,1393,1394],{},"moyenne à élevée",[648,1396,1397,1399,1401],{},[669,1398,712],{},[669,1400,715],{},[669,1402,1394],{},[648,1404,1405,1407,1409],{},[669,1406,726],{},[669,1408,729],{},[669,1410,1411],{},"moyenne",[593,1413,1415],{"id":1414},"pièges-courants","Pièges courants",[795,1417,1418,1504,1507],{},[798,1419,1420,1422,1423,1425,1426,1498,1499,1422,1501,1503],{},[602,1421,765],{}," (",[768,1424,770],{},") ",[866,1427,1429,1445],{"className":1428},[873],[866,1430,1432],{"className":1431},[877],[879,1433,1434],{"xmlns":881},[884,1435,1436,1442],{},[887,1437,1438],{},[904,1439,1441],{"mathvariant":1440},"normal","≠",[934,1443,1444],{"encoding":936},"\\neq",[866,1446,1448],{"className":1447,"ariaHidden":912},[941],[866,1449,1451,1455],{"className":1450},[945],[866,1452],{"className":1453,"style":1454},[949],"height:0.8889em;vertical-align:-0.1944em;",[866,1456,1458,1491,1495],{"className":1457},[1013],[866,1459,1461],{"className":1460},[1013],[866,1462,1465],{"className":1463},[954,1464],"vbox",[866,1466,1469],{"className":1467},[1468],"thinbox",[866,1470,1473,1476,1487],{"className":1471},[1472],"rlap",[866,1474],{"className":1475,"style":1454},[949],[866,1477,1480],{"className":1478},[1479],"inner",[866,1481,1483],{"className":1482},[954],[866,1484,1486],{"className":1485},[1013],"",[866,1488],{"className":1489},[1490],"fix",[866,1492],{"className":1493},[958,1494],"nobreak",[866,1496,1240],{"className":1497},[1013]," ",[602,1500,774],{},[768,1502,778],{},"). 1 octet = 8 bits.",[798,1505,1506],{},"La fibre est filaire ; la 5G est sans fil, malgré la vitesse.",[798,1508,1509,1510,1169],{},"L'indépendance physique rend Internet résilient, mais ",[602,1511,1512],{},"pas indestructible",[593,1514,1516],{"id":1515},"chiffres-clés-à-connaître","Chiffres-clés à connaître",[795,1518,1519,1526,1533],{},[798,1520,1521,1522,1525],{},"Le trafic Internet ",[602,1523,1524],{},"double tous les 2 à 3 ans"," environ.",[798,1527,1528,1529,1532],{},"La vidéo en streaming est le ",[602,1530,1531],{},"premier contributeur"," au trafic actuel.",[798,1534,830,1535,1537],{},[602,1536,833],{}," d'Internet sont en grande majorité des fibres optiques sous-marines.",{"title":788,"searchDepth":1125,"depth":1125,"links":1539},[1540,1541,1542,1543,1544],{"id":1157,"depth":1125,"text":1158},{"id":1172,"depth":1125,"text":1173},{"id":1338,"depth":1125,"text":1339},{"id":1414,"depth":1125,"text":1415},{"id":1515,"depth":1125,"text":1516},"Mémo de révision sur l'indépendance d'Internet par rapport au matériel.",{},"\u002Fsnt-2nde\u002Fsa-internet\u002Freseaux-physiques.memo",[],{"title":1151,"description":1545},"0.snt-2nde\u002Fsa-internet\u002F2.reseaux-physiques.memo","IxGmJ1J530QLFykTr1-rb1Q-elvQoNVcDRm8EzW8KSE",{"id":1553,"title":1554,"body":1555,"description":1779,"extension":1136,"meta":1780,"navigation":1143,"path":1781,"seo":1782,"stem":1783,"__hash__":1784},"coursSlides\u002F0.snt-2nde\u002Fsa-internet\u002F2.reseaux-physiques.slides.md","Internet et les réseaux physiques — diapositives",{"type":590,"value":1556,"toc":1777},[1557,1561,1564,1569,1572,1576,1583,1586,1589,1591,1595,1613,1615,1619,1636,1638,1642,1658,1691,1694,1696,1700,1707,1712,1731,1742,1744,1748,1751,1761,1764,1766,1770],[1558,1559,25],"h1",{"id":1560},"internet-et-les-réseaux-physiques",[598,1562,1563],{},"Un réseau logique sur des supports variés.",[598,1565,1566,1567],{},"SNT Seconde — chapitre Internet — ",[611,1568],{"code":588},[1570,1571],"hr",{},[1558,1573,1575],{"id":1574},"internet-nest-pas-un-câble","Internet n'est pas un câble",[598,1577,1161,1578,1580,1581,1169],{},[602,1579,608],{},", défini par des ",[602,1582,632],{},[598,1584,1585],{},"Les supports physiques sont variés et interchangeables.",[598,1587,1588],{},"Analogie : le réseau routier — la destination est la même, les routes empruntées varient.",[1570,1590],{},[1558,1592,1594],{"id":1593},"supports-filaires","Supports filaires",[795,1596,1597,1603,1608],{},[798,1598,1599,1602],{},[602,1600,1601],{},"Câble Ethernet"," (cuivre) : 100 Mbit\u002Fs à 10 Gbit\u002Fs, réseau local.",[798,1604,1605,1607],{},[602,1606,685],{}," : Gbit\u002Fs, accès Internet, dorsales.",[798,1609,1610,1612],{},[602,1611,808],{}," (cuivre téléphonique) : obsolète mais encore présent.",[1570,1614],{},[1558,1616,1618],{"id":1617},"supports-sans-fil","Supports sans fil",[795,1620,1621,1626,1631],{},[798,1622,1623,1625],{},[602,1624,698],{}," : local, sensible aux obstacles.",[798,1627,1628,1630],{},[602,1629,712],{}," : mobile, dépend de la distance à l'antenne.",[798,1632,1633,1635],{},[602,1634,726],{}," : zones isolées, mer, avion.",[1570,1637],{},[1558,1639,1641],{"id":1640},"bit-vs-octet-attention","Bit vs octet — attention",[795,1643,1644,1651],{},[798,1645,1646,1422,1648,1650],{},[602,1647,765],{},[768,1649,770],{},") : unité d'information.",[798,1652,1653,1422,1655,1657],{},[602,1654,774],{},[768,1656,778],{},") : 8 bits.",[598,1659,1660,1661,1690],{},"100 Mbit\u002Fs ",[866,1662,1664,1678],{"className":1663},[873],[866,1665,1667],{"className":1666},[877],[879,1668,1669],{"xmlns":881},[884,1670,1671,1675],{},[887,1672,1673],{},[904,1674,922],{},[934,1676,1677],{"encoding":936},"\\approx",[866,1679,1681],{"className":1680,"ariaHidden":912},[941],[866,1682,1684,1687],{"className":1683},[945],[866,1685],{"className":1686,"style":1302},[949],[866,1688,922],{"className":1689},[1013]," 12,5 Mo\u002Fs.",[598,1692,1693],{},"Une « connexion 100 méga » transmet environ 12,5 Mo par seconde, pas 100 Mo.",[1570,1695],{},[1558,1697,1699],{"id":1698},"croissance-du-trafic-mondial","Croissance du trafic mondial",[1701,1702],"illustration",{"alt":1703,"kind":1704,"src":1705,"svg":1706},"Croissance du trafic Internet mondial","schema","\u002Fillustrations\u002F0.snt-2nde\u002Fsa-internet\u002Ftrafic-internet.svg","\u003Csvg class=\"illustration-svg\" xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" viewBox=\"0 0 480 240\" role=\"img\" aria-label=\"Courbe exponentielle de la croissance du trafic Internet mondial entre 2000 et 2025, doublant tous les 2 à 3 ans\">\n  \u003Ctitle>Croissance du trafic Internet mondial\u003C\u002Ftitle>\n  \u003Cstyle>\n    .ti-axis  { stroke: var(--diagram-line); stroke-width: 1.5; fill: none; }\n    .ti-curve { stroke: var(--diagram-node-border); stroke-width: 2.5; fill: none; stroke-linecap: round; }\n    .ti-arrow { fill: var(--diagram-line); }\n    .ti-label { fill: var(--diagram-line); font-family: 'JetBrains Mono', monospace; font-size: 11px; }\n    .ti-axis-name { fill: var(--diagram-text); font-family: Geist, Inter, system-ui, sans-serif; font-size: 12px; font-weight: 500; }\n    .ti-annot { fill: var(--diagram-text); font-family: Geist, Inter, system-ui, sans-serif; font-size: 13px; font-style: italic; }\n    .ti-annot-leader { stroke: var(--diagram-border); stroke-width: 1.5; stroke-dasharray: 4 3; fill: none; }\n  \u003C\u002Fstyle>\n\n  \u003C!-- axes -->\n  \u003Cpath class=\"ti-axis\" d=\"M 60 28 L 60 205 L 448 205\"\u002F>\n  \u003Cpolygon class=\"ti-arrow\" points=\"60,22 56,32 64,32\"\u002F>\n  \u003Cpolygon class=\"ti-arrow\" points=\"454,205 444,201 444,209\"\u002F>\n\n  \u003C!-- nom d'axe (l'axe horizontal = le temps, balisé par les repères 2000\u002F2025) -->\n  \u003Ctext x=\"44\" y=\"40\" class=\"ti-axis-name\" text-anchor=\"end\">trafic\u003C\u002Ftext>\n\n  \u003C!-- repères temporels -->\n  \u003Ctext x=\"60\" y=\"222\" class=\"ti-label\" text-anchor=\"middle\">2000\u003C\u002Ftext>\n  \u003Ctext x=\"440\" y=\"222\" class=\"ti-label\" text-anchor=\"middle\">2025\u003C\u002Ftext>\n\n  \u003C!-- courbe exponentielle -->\n  \u003Cpath class=\"ti-curve\" d=\"M 62 198 C 200 194, 300 168, 360 120 C 400 88, 425 56, 440 36\"\u002F>\n\n  \u003C!-- annotation -->\n  \u003Cpath class=\"ti-annot-leader\" d=\"M 300 150 C 250 140, 210 120, 190 96\"\u002F>\n  \u003Ctext x=\"186\" y=\"90\" class=\"ti-annot\" text-anchor=\"end\">× 2 tous les 2–3 ans\u003C\u002Ftext>\n\u003C\u002Fsvg>\n",[598,1708,1709,1710,1169],{},"Le trafic mondial ",[602,1711,1524],{},[598,1713,1714,1715,1718,1719,1722,1723,1726,1727,1730],{},"Ordre de grandeur : ~",[602,1716,1717],{},"150 To\u002Fs"," ÷ ~",[602,1720,1721],{},"2,5 Go"," par heure de vidéo HD\n≈ ",[602,1724,1725],{},"60 000 heures de vidéo par seconde"," — près de ",[602,1728,1729],{},"7 ans",", chaque seconde.",[598,1732,1733,1734,1055,1737,1739,1740,1169],{},"Croissance portée par la ",[602,1735,1736],{},"vidéo",[602,1738,1058],{},", les ",[602,1741,1062],{},[1570,1743],{},[1558,1745,1747],{"id":1746},"résilience-par-décentralisation","Résilience par décentralisation",[598,1749,1750],{},"Pas de point unique de défaillance.",[598,1752,1753,1754,1757,1758,1169],{},"Si une liaison tombe, les paquets empruntent ",[602,1755,1756],{},"un autre chemin",", sur un ",[602,1759,1760],{},"autre support",[598,1762,1763],{},"Cette résilience est voulue dès la conception (origine militaire, années 1960).",[1570,1765],{},[1558,1767,1769],{"id":1768},"à-retenir","À retenir",[598,1771,1772,1773,1776],{},"Internet est ",[602,1774,1775],{},"agnostique"," par rapport à son support physique : fibre,\nondes, satellites cohabitent. 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