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Network Certification Bible by Jeff Bienvenu

By Jeff Bienvenu

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What makes FDDI LANs more reliable than other types? ✦ Answers to these questions can be found at the end of the chapter. F 3/20/02 3:07 PM Page 5 Chapter 1 ✦ Network Topologies and Technologies A local-area network (LAN) is basically defined as two or more computers connected by a structured wire system for the purpose of sharing resources and files. In this chapter we will explain the various ‘structured wire systems’ that the Network Engineer will deal with during the course of their job. Wireless LANs are becoming more and more popular, but even these devices rely on some amount of physical wires in most cases.

3 (Ethernet) standards • 10BASE-T • 100BASE-TX • 10BASE2 • 10BASE5 • 100BASE-FX • Gigabit Ethernet ✦ Recognize the following media connectors and/or describe their uses: • RJ-11 • RJ-45 • AUI • BNC • ST • SC ✦ Choose the appropriate media type and connectors to add a client to an existing network. F 28 3/20/02 3:07 PM Page 28 Part I ✦ Media and Topologies PRE-TEST QUESTIONS 1. 3 standard? 2. What access method does the Ethernet use? 3. What does the “10” in 10BASE2 signify? 4. What are the other common terms for 10Base5?

Bus B. Mesh C. FDDI D. Star 6. What is the maximum speed of a coax Bus network? A. 2Mb B. 4Mb C. 10Mb D. 100Mb 7. Collisions on an Ethernet segment __________________________. A. Must be avoided at all costs B. Should be minimized where possible C. Are normal and necessary D. Never occur because the token is passed in sequence 8. A Token Ring network ensures equal access to transmit data on a LAN because: A. Each device gets equal access to the token. B. Collisions are minimized by the MAU so more time is available to talk.

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