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Chapter 4Network Layer(IP and Routing Protocols)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 lotof work on our part. In return for use, we only ask the following:qIf you use these slides (e.g., in a class) in substantially unaltered form, that you mention their source (after all, we’d like people to use our book!)qIf you post any slides in substantially unaltered form on a www site, 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/KWRAll material copyright 1996-2009J.F Kurose and K.W. Ross, All Rights ReservedComputer Networking: A Top Down Approach 5thedition. Jim Kurose, Keith RossAddison-Wesley, April 2009. IP and Routing Protocols4-1
Chapter 4: Network LayerChapter goals:runderstand principles behind network layer services:mNetwork layer service modelsmForwarding versus routingmIPv4 addressingmNATmIPv4 Vs. IPv6mRouting protocolsIP and Routing Protocols4-2
Chapter 4: Network Layerr4. 1 Introductionr4.2 Virtual circuit and datagram networksr4.3 What’s inside a routerr4.4 IP: Internet ProtocolmDatagram formatmIPv4 addressingmICMPmIPv6r4.5 Routing algorithmsmLink statemDistance VectormHierarchical routingr4.6 Routing in the InternetmRIPmOSPFmBGPr4.7 Broadcast and multicast routingIP and Routing Protocols4-3
Network layerrtransport segment from sending to receiving hostrلاطنارلإاﺿفاِلron sending side encapsulates segments into datagramsrدإرلابومﺿناطططتاتron rcving side, delivers segments to transport layerrاباول،ومولاطإطالrnetwork layer protocols in everyhost, routerrروووتطالﺿف،زوrrouter examines header fields in all IP datagrams passing through itrومزاوصولارأسططتتIP ارنھوapplicationtransportdata linkphysicalapplicationtransportnetworkdata linkphysicalnetworkdata linkphysicalnetworkdata linkphysicalnetworkdata linkphysicalnetworkdata linkphysicalnetworkdata linkphysicalnetworkdata linkphysicalnetworkdata linkphysicalnetworkdata linkphysicalnetworkdata linkphysicalnetworkdata linkphysicalnetworkdata linkphysicalIP and Routing Protocols4-4
Two Key Network-Layer Functionsوظنأنطاrforwarding:move packets from router’s input to appropriate router outputrإدةاو:لازمنإدلزاوإإراجزاوابrrouting:determine route taken by

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Term
Spring
Professor
Kubiatowicz
Tags
IP address, Network address translation

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