计算机网络课件英文版Chapter2 Application Layer.ppt

2: Application Layer 1 Chapter 2 Application working: A Top Down Approach , 4 th edition. Jim Kurose, Keith Ross Addison-Wesley, July 2007. A note on the use of these ppt slides: We ’ re making these slides freely available to all (faculty, students, readers). They ’ re in PowerPoint form so you can add, modify, and delete slides (including this one) and slide content to suit your needs. They obviously represent a lot of work on our part. In return for use, we only ask the following: ? If you use these slides (., in a class) in substantially unaltered form, that you mention their source (after all, we ’ d like people to use our book!) ? If you post any slides in substantially unaltered form on a , that you note that they are adapted from (or perhaps identical to) our slides, and note our copyright of this material. Thanks and enjoy! JFK/KWR All material copyright 1996-2007 Kurose and . Ross, All Rights Reserved 2: Application Layer 2 Chapter 2: Application layer r Principles of network applications r Web and HTTP r FTP r Electronic Mail v SMTP, POP3, IMAP r DNS r P2P Applications r Socket programming with TCP r Socket programming with UDP 2: Application Layer 3 Chapter 2: Application Layer Our goals: r conceptual, implementation aspects work application protocols v transport-layer service models v client-server paradigm v peer-to-peer paradigm r learn about protocols by examining popular application-level protocols v HTTP v FTP v SMTP / POP3 / IMAP v DNS r work applications v socket API 2: Application Layer 4 work apps r e-mail r web r instant messaging r remote login r P2P file sharing r multi-work games r streaming stored video clips r voice over IP r real-time video conferencing r puting rrr 2: Application Layer 6 Chapter 2: Application layer r Principles of network applications r Web and HTTP r FTP r Electronic Mail v SMTP, POP3, IMAP r DNS r P2P file sharing r