tailieunhanh - Lecture Computer networking: A top-down approach (6/e): Chapter 4 - James F. Kurose, Keith W. Ross

Chapter 4: Network layer. In this chapter, we’ll learn exactly how the network layer implements the hostto-host communication service. We’ll see that unlike the transport and application layers, there is a piece of the network layer in each and every host and router in the network. Because of this, network-layer protocols are among the most challenging in the protocol stack. | Chapter 4 Network Layer Computer Networking: A Top Down Approach 6th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 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 see the animations; and 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) that you mention their source (after all, we’d like people to use our book!) If you post any slides 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/KWR All material copyright 1996-2012 Kurose and . Ross, All Rights Reserved Network Layer 4- Network Layer 4- Chapter 4: network layer chapter goals: understand principles behind network | Chapter 4 Network Layer Computer Networking: A Top Down Approach 6th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 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 see the animations; and 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) that you mention their source (after all, we’d like people to use our book!) If you post any slides 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/KWR All material copyright 1996-2012 Kurose and . Ross, All Rights Reserved Network Layer 4- Network Layer 4- Chapter 4: network layer chapter goals: understand principles behind network layer services: network layer service models forwarding versus routing how a router works routing (path selection) broadcast, multicast instantiation, implementation in the Internet Network Layer 4- introduction virtual circuit and datagram networks what’s inside a router IP: Internet Protocol datagram format IPv4 addressing ICMP IPv6 routing algorithms link state distance vector hierarchical routing routing in the Internet RIP OSPF BGP broadcast and multicast routing Chapter 4: outline Network Layer 4- Network layer transport segment from sending to receiving host on sending side encapsulates segments into datagrams on receiving side, delivers segments to transport layer network layer protocols in every host, router router examines header fields in all IP datagrams passing through it application transport network data link physical application transport network data link physical network data link physical network data link physical network data .