Chapter 07 Review Questions
3. List the advantages and disadvantages of local area networks.
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4. What are the basic topologies of local area networks? List two advantages that each topology has over the others.
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5. What is meant by a passive device?
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6. What is meant by a bidirectional signal?
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7. What are the primary differences between baseband technology and broadband technology?
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10. How are hubs and MAUs different? How are they alike?
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11. What is the difference between a physical design and a logical design.?
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12. What is a medium access control protocol?
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.13. What are the basic operating principles behind CSMA/CD?
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15. List three examples of what can go wrong with a token.
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16. What is meant by a nondeterministic protocol?
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18. What is the difference between Fast Ethernet and regular Ethernet?
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19. List three advantages of FDDI over token ring.
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20. What are the latest 10-Gbps Ethernet standards?
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Chapter 07 Exercises
1. What properties set a local area network apart from other forms of networks?
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3. Describe an example of a broadband bus system, besides cable television.
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4. Of all the local area networks introduced in this chapter, is any system capable of supporting a full-duplex connection? Which one(s)?
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5. Why is a transmitting token ring station responsible for removing its own data from a ring?
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6. Physically, a hub looks the same as a MAU. Logically they are different. Explain how they are different.
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7. In the IEEE 802.5 token ring protocol, the FS field has two copies of the A bit and the C bit. Why are there two copies?
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8. Explain the statement that a ring is "composed of segments of one-way point to point cables strung between pairs of repeaters."
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9. Is a hub a passive device? Explain.
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11. If a network is described as 1000BaseT, list everything you know about that network.
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12. A FDDI network has been described as having multiple tokens. What does this mean? Would a multiple token concept work on 16 M-bps token ring? Explain your reasoning.
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13. The Internet model doesn't have a data-link layer. Does it have a medium access control sublayer? Explain.
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14. Suppose workstation A wants to send the message HELLO to workstation B. Both workstations are on an IEEE 802.3 local area network. Workstation A has the binary address "1" and workstation B has the binary address "10." Show the resulting MAC sublayer frame (in binary) that is transmitted. Don't calculate a CRC; just make one up.
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15. What is the difference between the physical representation of a star-wired ring LAN and the logical representation? What is the difference between the physical representation of a star-wired bus LAN and the logical representation?
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16. Are collisions possible in token ring local area networks? Explain.
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17. Which of the wireless LAN protocols can support data rates as high as 54 Mbps?
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20. In wireless CSMA/CD, if a user device is trying to transmit standard data, and an access point device is trying to issue a poll at the same time, which device will transmit first, and why?
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21. Explain the different between 1000BaseSX and 1000BaseLX.
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