List of Figures

1.1

Simple routing example

4

1.2

The seven-layer OSI reference model, together with the TCP/IP equivalents

5

1.3

Internet headers prepended to TELNET data

6

1.4

ICMP Redirect messages remove extra router hops

15

1.5

Sample TCP/IP network showing prefix aggregation

18

1.6

The IPv6 network-layer packet header

24

2.1

Size increases in the Internet’s routing tables (logarithmic scale)

29

2.2

Patricia-tree implementation of routing table lookup

31

2.3

Hash-table front end to a routing table

32

2.4

Organization of the Internet into Autonomous Systems

33

2.5

Sample network topology to illustrate Distance Vector protocol behavior

36

3.1

Timeline of OSPF development

44

3.2

Configuring metrics to avoid links with high delay

45

3.3

One configuration tested during the ...

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