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This chapter is from the book

Exam Preparation Tasks

Review All the Key Topics

Review the most important topics from this chapter, noted with the key topics icon. Table 7-6 lists these key topics and where each is discussed.

Table 7-6. Key Topics for Chapter 7

Topic Topic Element

Description

Page Number

Table 7-1

Popular ICMP messages and their purpose

271

Figure 7-3

Diagram of how the TTL IP header field and the ICMP Time Exceeded message work

275

Figure 7-4

Demonstration of how the traceroute command uses the TTL field and Time Exceeded message

277

List

Two major steps and several substeps in a suggested host routing problem isolation process

279

List

Three major steps for problem isolation with IP routing in routers, with the list numbered as a continuation of the host routing problem isolation list

281

List

Three tips for general items to check when troubleshooting host connectivity problems

289

List

Configuration step list for LAN switch IP details

290

List

Conditions under which overlapping subnets can be configured, and when IOS can prevent this error

293

List

Summary of troubleshooting tips for questions in which VLSM may be causing a problem

297

List

Three steps for troubleshooting ACL problems, particularly when the configuration cannot be displayed

298-299

Complete the Tables and Lists from Memory

Print a copy of Appendix J, "Memory Tables" (found on the CD), or at least the section for this chapter, and complete the tables and lists from memory. Appendix K, "Memory Tables Answer Key," also on the CD, includes completed tables and lists for you to check your work.

Definitions of Key Terms

Define the following key terms from this chapter, and check your answers in the glossary:

  • Forward route, reverse route
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