Networking: A Beginner's Guide Fifth Edition- P16

Networking: A Beginner’s Guide Fifth Edition- P16:I have run into many people over the years who have gained good evenimpressive working knowledge of PCs, operating systems, applications,and common problems and solutions. Many of these people are wizards withdesktop computers.
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Networking: A Beginner’s Guide Fifth Edition- P16 Chapter 4: Understanding Network Cabling 57protocol on your computers, and try to ping another workstation in the completesegment.) If they can log in, then you know the problem is further on along the cable.Move to a new location, attach the extra terminator, and try again. Eventually, youwill find two nearby locations where the terminator will allow the network to workin one spot but not in the next spot. You should find the cable problem somewherebetween those two node locations. This approach requires patience, but it worksfine in a pinch. More troublesome still on coaxial networks is a problem that is causing poornetwork performance, but not causing any nodes to actually disconnect from thenetwork. Such problems are often intermittent and not easy to find with a cablescanner. When you have this type of problem, your best approach is to come up witha test that can quickly tell you how fast the nodes are communicating with the network.For example, you can time how long it takes to copy a particular file from the server.Next, use a terminator to close off a large part of the segment and perform the testagain. Keep moving the terminator and retrying the test until you discover which partof the cable slows down network performance on the segment. Then either replace allthose portions or narrow your search further. This type of problem is usually causedby a poor connection in one of the male cable-end BNC connectors, although a flakyT-connector or barrel connector can also be the culprit. It’s usually fastest—providingyou narrow the problem to a small enough area—to simply replace all the cable andconnectors in that location. Having a second person help you troubleshoot coaxial cable problems makes thejob much easier. One person remains in a fixed location at one end of the segmentwith a test computer, and the other person moves from location to location with aterminator. While the mobile troubleshooter maps out parts of the segment with theterminator, the stationary person can quickly test to see if any individual parts ofthe segment prove to be a source of the problem (communicating via a cell phone orportable radio). TIP Before going to the trouble of pulling a new section of cable through the wall or replacing various cables and connectors, try simply running an extra cable from one location to another, such as out the door of one room, down the hallway, and into the room of another. Then test to see if this “mapping out” of the suspect portion of the segment fixes the problem. If it does, go ahead and have a new cable run in the walls. If the problem is still there, you need to look further before replacing cable and connectors. As a general rule, troubleshooting cable problems requires a careful, step-by-stepapproach and patience. For coaxial cable systems, troubleshooting is made moredifficult because a lot of network users are breathing down your neck while you’retrying to concentrate and find the problem. You’re lucky if you can find a coaxialnetwork problem and solve it within an hour. Some problems may take several hours(or more) to resolve.58 Networking: A Beginner’s Guide Chapter Summary In this chapter, you learned about network cable systems. It covered the major topologies in which networks are wired, how CSMA/CD and token passing work, what types of cables are commonly used, and how they should be installed. You also learned some tips about selecting cabling contractors and troubleshooting network cable problems. The next chapter expands on this discussion by focusing on creating small office or home office networks. As part of that discussion, you will also learn about wireless networking.Chapter 5Home Networking 5960 Networking: A Beginner’s Guide A lthough this book focuses on business networking, small office and home office (SOHO) networking is growing in importance, and no introduction to networking would be complete without at least of brief discussion of this topic. This chapter provides an overview of how multiple computers in a home can be networked together. Benefits from Home Networking Many of the benefits that businesses receive from having a network also apply to homes that have multiple computers, as follows: Printer sharing Printers can be shared. For example, some homes may have both color inkjet and black-and-white laser printers. By sharing these printers through a home network, each person can use the most appropriate printer for any particular print job. Connect ...