Review Questions Chapter 08
3. What is the basic function of a hub? .
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4. What is the difference between a managed hub and an unmanaged hub? .
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5. What are the basic functions of a bridge?
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6. What does a filter do? .
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7. How does a transparent bridge work?
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8. What is backward learning?
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9. How does a bridge encapsulate a message for transmission? (For a refresher on encapsulation, see Chapter One.)
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11. What are the basic functions of a switch? .
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12. How does a switch differ from a hub? From a bridge?
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13. What is cut-through architecture?
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14. How is a full-duplex switch different from a half-duplex switch?
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15. What are the basic functions of a router?
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Exercises Chapter 08
1. Explain whether each of the following is a reason to or not to segment a LAN into smaller segments:
a. large number of network collisions
b. Administrators decide it is time to add an additional Web server
c. Users complain of very slow response time
d. Large number of frame runts
e. A new network operating system is installed
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2. How is a bridge similar to a switch? How are they different?
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8. Is the hub the only device on a local area network that can be managed? Explain.
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9. a. The local area network shown in Figure 8-18 has two hubs (X and Y) interconnecting the workstations and servers. Which workstations and servers will receive a copy of a packet if the following workstations/servers transmit a message:
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* Workstation 1 sends a message to workstation 3:
* Workstation 2 sends a message to Server 1:
* Server 1 sends a message to workstation 3:
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b. Replace Hub Y with a switch. Now which workstations and servers will receive a copy of a packet if the following workstations/servers transmit a message:
* Workstation 1 sends a message to workstation 3:
* Workstation 2 sends a message to Server 1:
* Server 1 sends a message to workstation 3:
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10. What does it mean when a switch or device is cut-through? What is the main disadvantage of a cut-through switch? Is there a way to solve the disadvantage of a cut-through switch without losing the advantages? Defend your answer.
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12. Your company's bridge between its two networks has just died.. You have a router lying on your desk that is not currently being used. Will the router work in place of the broken bridge? Explain.
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