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                                   CHAPTER EIGHT ANSWERS TO REVIEW QUESTIONS

1. A central computer, smaller computer systems, hosts.

2. Two national networks are ARPANET and NSFNET.

3. Node.

4. Link.

5. Point-to-point connections are impractical in a large network because too many connections are needed.

6. Circuit-switching.

7. Circuit-switching.

8. Message-switching networks use store and forward techniques.

9. Packet-switching.

10. The advantages of message-switching over circuit-switching networks are given in Table 8-1 on page 8-7 and any three can be used.

11. Packet-switching networks have better performance than message-switching networks because smaller messages result in faster transmission rates.

12. Virtual circuit packet-switching is preferred when two computers will be transmitting data continuously for 24 to 48 hours.

13. Building, office.

14. Common carriers.

15. Topology.

16. See Figures 8-14 on page 8-16 (ring), 8-15 on page 8-17 (bus), and 8-13 on page 8-15 (star).

17. Organization chart.

18. A private network is owned by a private corporation, whereas a public network is owned by a private company and a common carrier.

19. An intranet is an internal company network that uses Internet and Web technology.

20. Adaptive.