Syngress - Eleventh Hour Network+ Exam N10-004 Study Guide (11 ...

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18 CHAPTER 1 Network Fundamentals It is also wrong because Office B isn’t part of a WAN. Answer B is incorrect because although it has a LAN, it isn’t connected to the other networks and therefore isn’t part of the WAN. Answer D is incorrect because not every office has a LAN, and the others connected together form a WAN. 4. Correct answer and explanation: D. Terminators are missing from the ends of the cable. The topology described in the question refers to a bus topology and states that the entire network is down although there is no cable break. Terminators are needed on a bus topology because they prevent packets from bouncing up and down the cable. Terminators need to be attached to each end of the cable to absorb electronic signals. This clears the cable to allow other computers to send packets on the network. If there is no termination, the entire network fails. Incorrect answers and explanations: A, B, and C. Answer A is incorrect because a failed network card would only affect one computer. Answer B is incorrect because a bus topology is passive and doesn’t require each computer to be present to receive and resend data along the cable. Answer C is incorrect because T-connectors are used to connect the computers to the cable. They aren’t used to terminate the ends of a cable. 5. Correct answer and explanation: D. Hub. In a star topology, all computers are connected through one central hub. Computers are cabled to this hub making it a centralized point where the network is connected. If the hub fails, the network would go down. Incorrect answers and explanations: A, B, and C. Answer A is incorrect because if a cable broke or failed in some way, it would only remove the computer connected to it from the network. Answer B is incorrect because a failed network card in a computer would only prevent that particular computer from being able to access the network. Answer C is incorrect because a T-connector is used to connect computers to a cable in a bus topology. A star topology is being used in this situation.
CHAPTER 2 Network Media 19 <strong>Exam</strong> objectives in this chapter ■ Cabling and Connectors Overview ■ Media Issues ■ Cable Testers and Troubleshooting ■ Simplex, Half-Duplex, and Full Duplex ■ Cabling ■ Cable Management ■ LAN Technologies and Media Standards ■ Connectors ■ Recognizing Cables CABLING AND CONNECTORS OVERVIEW The media that carry data make up the basic infrastructure of a network. Connectors provide an access point for data and are attached to the ends of the cables, which are plugged into a network card. This creates a physical link between each device and others on your network. Some cables can carry the data for 100 m or so, while others can span greater distances connecting widely dispersed systems. There are different types of cabling and different types of connectors that may be used. Fundamentals of Cabling The following are the three types of physical media that can be used on a network: ■ ■ ■ Coaxial cable Twisted-pair cable Fiber-optic cable
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WAN Protocols and Properties 109 In
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Internet Access Methods 113 EXAM WA
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Glossary 177 Access Determines who
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188 Index Network troubleshooting,
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