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INF3270-Chap2-Couche_Applications-3s

INF3270-Chap2-Couche_Applications-3s - Chapitre 2 Couche...

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1 Chapitre 2 Couche applications UQAM - Session Autome 2011 1 R Zidane - INF3270 - Téléinformatique Redouane Zidane Objectif square4 Comprendre l’aspect conceptuel et l’implantation des applications réseau circle6 Paradigme client-server circle6 Paradigme peer-to-peer square4 Examiner les protocoles populaires de la couche application circle6 HTTP circle6 FTP circle6 SMTP / POP3 / IMAP circle6 DNS square4 Programmer des applications réseau circle6 Les sockets UQAM - Session Autome 2011 R Zidane - INF3270 - Téléinformatique 2 Matériel basé sur la référence J.F Kurose and K.W. Ross Quelques applications réseau (1) square4 E-mail square4 Web square4 Messagerie instantanée square4 Accès à distance square4 Partage de fichiers P2P square4 Jeux en réseau square4 “Streaming” vidéo square4 Téléphonie IP square4 Vidéo conférence square4 IPTV UQAM - Session Autome 2011 R Zidane - INF3270 - Téléinformatique 3
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2 Quelques applications réseau (2) (Wired Magazine, Août 2010) UQAM - Session Autome 2011 4 R Zidane - INF3270 - Téléinformatique Quelques applications réseau (3) (Wired Magazine, Août 2010) “ You wake up and check your email on your bedside iPad — that’s one app. During breakfast you browse Facebook, Twitter, and The New York Times — three more apps. On the way to the office, you listen to a podcast on your smartphone. Another app. At work, you scroll through RSS feeds in a reader and have Skype and IM conversations. More apps. At the end of the day, you come home, make dinner while listening to Pandora, play some games on Xbox Live, and watch a movie on Netflix’s streaming service. You’ve spent the day on the Internet — but not on the Web. And you are not alone.” UQAM - Session Autome 2011 5 R Zidane - INF3270 - Téléinformatique R Zidane - INF3270 - Téléinformatique 6 Sommaire square4 Introduction aux applications réseau square4 Web et HTTP square4 FTP square4 Courrier électronique circle6 SMTP, POP3, IMAP square4 DNS square4 Applications P2P square4 Programmation des sockets avec TC UQAM - Session Autome 2011
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3 R Zidane - INF3270 - Téléinformatique 7 Architectures application square4 Client-serveur square4 Peer-to-peer (P2P) square4 Hybride (client-serveur et P2P) UQAM - Session Autome 2011 Architecture client-serveur square4 Serveur: circle6 Propose les services demandés par le client circle6 Exemple : circle6 Le serveur Web envoie les pages Web demandées square4 Client: circle6 Initie le contact avec le serveur circle6 Demande un service circle6 Exemple: circle6 Web: le client est implanté dans le navigateur circle6 E-mail: dans le « mail reader » UQAM - Session Autome 2011 R Zidane - INF3270 - Téléinformatique 8 client/serveur Architecture P2P square4 Pas de serveur square4 Hôtes clients communiquent directement square4 Hôtes connectés de façon intermittente UQAM - Session Autome 2011 R Zidane - INF3270 - Téléinformatique 9 peer-peer
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4 Architecture hybride square4 Skype circle6 Application voix sur IP P2P circle6 Serveur centralisé circle6 Son rôle: Trouver l’adresse du hôte appelé circle6 Connexion client-client: circle6
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