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CompTIA Network+ Certification Study Guide part 61

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CompTIA’s Network+ certification Study Guide part 61 is a globally-recognized, vendor neutral exam that has helped over 235,000 IT professionals reach further and higher in their careers. The 2009 Network+ exam (N10-004) is a major update with more focus on security and wireless aspects of networking. Our new study guide has been updated accordingly with focus on network, systems, and WAN security and complete coverage of today’s wireless networking standards. | 586 CHAPTER 12 Network Troubleshooting Methodology FIGURE 12.3 Windows Vista Device Manager. FIGURE 12.4 Updating the Device Driver. Troubleshooting the Physical Layer 587 3. Click Update Driver and follow the prompts to update the driver to the latest version. 4. Click OK when you re finished and reboot your PC. Problems with Cables and Other Network Media Another type of problem that can mimic TCP IP protocol configuration problems is damaged defective or improperly installed cables or other network media. Broken or shorted cables can be detected with a cable tester. Some of the more sophisticated and expensive local area network LAN testers will even pinpoint the exact location of the break. As a network administrator you may have other personnel who handle hardware and cabling. It is important however that you are able to recognize the symptoms of physical layer problems so that you will know when to call in the technicians rather than spend your time attempting to fix what isn t broken. Damage to the media is not the only factor when considering physical layer problems. All network architectures such as Ethernet Token Ring and AppleTalk include specifications that must be met concerning networking equipment and media. If those rules are ignored connectivity may be lost completely or you may experience intermittent problems. Some instances in which ignoring these specifications can result in difficulties in establishing or maintaining a connection include cable type and grade. Following the guidelines surrounding the maximum allowable segment length for various network cable types is also important. Be sure that the cabling for your network meets specifications for the particular architecture. For instance a 10Base2 network requires not just thin coaxial cable but a particular type of thin coax RG-58 A U the cable grade is usually indicated on the side of the cable itself . Don t try to substitute something else that is close or looks similar you will be .