Chap-06 Delivery and Routing of IP Packets

Chap-06 Delivery and Routing of IP Packets - Chapter6...

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TCP/IP Protocol Suite 1 Chapter   6 Chapter   6 Upon completion you will be able to: Delivery, Forwarding, Delivery, Forwarding, and Routing of IP Packets and Routing of IP Packets Understand the different types of delivery and the connection Understand forwarding techniques in classful addressing Understand forwarding techniques in classless addressing Understand how a routing table works Understand the structure of a router Objectives
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TCP/IP Protocol Suite 2 6.1 DELIVERY The network layer supervises delivery, the handling of the packets by the The network layer supervises delivery, the handling of the packets by the underlying physical networks. Two important concepts are the type of underlying physical networks. Two important concepts are the type of connection and direct versus indirect delivery. connection and direct versus indirect delivery. The topics discussed in this section include: The topics discussed in this section include: Connection Types Connection Types Direct Versus Indirect Delivery Direct Versus Indirect Delivery
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TCP/IP Protocol Suite 3 IP is a connectionless protocol. Note: Note:
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TCP/IP Protocol Suite 4 Figure 6.1 Direct delivery
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TCP/IP Protocol Suite 5 Figure 6.2 Indirect delivery
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TCP/IP Protocol Suite 6 6.2 FORWARDING Forwarding means to place the packet in its route to its destination. Forwarding means to place the packet in its route to its destination. Forwarding requires a host or a router to have a routing table. . Forwarding requires a host or a router to have a routing table. . The topics discussed in this section include: The topics discussed in this section include: Forwarding Techniques Forwarding Techniques Forwarding with Classful Addressing Forwarding with Classful Addressing Forwarding with Classless Addressing Forwarding with Classless Addressing Combination Combination
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TCP/IP Protocol Suite 7 Figure 6.3 Next-hop method
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TCP/IP Protocol Suite 8 Figure 6.4 Network-specific method
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TCP/IP Protocol Suite 9 Figure 6.5 Host-specific routing
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TCP/IP Protocol Suite 10 Figure 6.6 Default routing
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TCP/IP Protocol Suite 11 Figure 6.7 Simplified forwarding module in classful address without subnetting
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TCP/IP Protocol Suite 12 Figure 6.8 shows an imaginary part of the Internet. Show the routing tables for router R1. Example  1 See Next Slide
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TCP/IP Protocol Suite 13 Figure 6.8 Configuration for routing, Example 1
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14 Solution Figure 6.9 shows the three tables used by router R1. Note that some entries in the next-hop address column are empty because in these cases, the destination is in the same network to which the router is connected (direct delivery). In these cases, the next- hop address used by ARP is simply the destination address of the packet as we will see in Chapter 7. Example
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This note was uploaded on 04/26/2010 for the course CSE CS501 taught by Professor Dmathur during the Winter '10 term at National Institute of Technology, Calicut.

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Chap-06 Delivery and Routing of IP Packets - Chapter6...

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