OBJECTIVES
This chapter covers the following CompTIA-specified objectives for the “Network Support” section of the Network+ exam.
Given a wiring task, select the appropriate tool (e.g., wire crimper, media tester, punchdown tool, tone generator, optical tester).
Working with wiring, or cable as it is often called, is a common task for network administrators. To do so effectively, you must understand the tools and concepts associated with making and testing cables.
Given a network scenario, interpret visual indicators (e.g., link lights, collision lights) to determine the nature of the problem.
Sometimes finding the source of a problem is as simple as looking at indicator lights. Many network devices have visual indicators that help you troubleshoot.
Given output from a diagnostic utility (e.g., tracert, ping, ipconfig), identify the utility and interpret the output.
Software utilities provide the network troubleshooter with information about the configuration of a system and a means to test connectivity with other systems on the network. Understanding how to interpret the information supplied by software utilities is a key skill for a network administrator.
OUTLINE
Introduction
Selecting the Appropriate Tool for Wiring
Wire Crimpers
Punchdown Tools
Tone Generators
Media Testers
Hardware Loopback Connectors
Interpreting Visual Indicators
LEDs on Networking Devices
LEDs on NICs and Other Devices
Using LEDs in Troubleshooting
Using Diagnostic Utilities
ping
The Destination Host Unreachable Message
The Request Timed Out Message
The Unknown Host Message
The Expired TTL Message
The tracert Command
The netstat Command
netstat -e
netstat -a
netstat -r
netstat -s
The ipconfig Command
The winipcfg Command
Chapter Summary
Apply Your Knowledge
STUDY STRATEGIES
Read the objectives at the beginning of the chapter.
Study the information in this chapter, paying special attention to the tables, which summarize key information.
Review the objectives again.
Study the output from the various commands demonstrated in this chapter.
Answer the exam questions at the end of the chapter and check your results.
Use the ExamGear test on the CD-ROM that accompanies this book to answer additional exam questions concerning this material.
Review the notes, tips, and exam tips in this chapter. Make sure you understand the information in the exam tips. If you don't understand the topic referenced in an exam tip, refer to the information in the chapter text and then read the exam tip again.