9781423902454_Sol_Ch07 - Network+ Guide to Networks, 5th...

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Network+ Guide to Networks, 5 th Edition Solutions 7– 1 Network+ Guide to Networks, 5 th Edition Chapter 7 Solutions Review Questions 1. Which of the following WAN topologies comes with the highest availability and the greatest cost? d. Full mesh 2. Which of the following elements of the PSTN is most likely capable of transmitting only analog signals? a. Local loop 3. A customer calls your ISP’s technical support line, complaining that his connection to the Internet usually goes as fast as 128 Kbps, but today it is only reaching 64 Kbps. He adds that he has tried dialing up three different times with the same result. What type of connection does this customer have? b. ISDN 4. What is the purpose of ISDN’s D channel? b. To carry call session information 5. Suppose you work for a bank and are leasing a frame relay connection to link an automatic teller machine located in a rural grocery store with your bank’s headquarters. Which of the following circuits would be the best option, given the type of use this automatic teller machine will experience? c. SVC 6. On an ISDN connection, what device separates the voice signal from the data signals at the customer premises? b. Terminal adapter 7. Which of the following WAN technologies operates at Layer 3 of the OSI model? d. None of the above 8. What technique enables DSL to achieve high throughput over PSTN lines? a. Data modulation 9. Suppose you establish a home network and you want all three of your computers to share one broadband cable connection to the Internet. You decide to buy a router to make this sharing possible. Where on your network should you install the router? c. Between the cable modem and the workstations
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Network+ Guide to Networks, 5 th Edition Solutions 7– 2 10. How does ATM differ from every other WAN technology described in this chapter? c. It uses fixed-sized cells to carry data. 11. You work for an Internet service provider that wants to lease a T3 over a SONET ring. What is the minimum Optical Carrier level that the SONET ring must have to support the bandwidth of a T3? a.
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9781423902454_Sol_Ch07 - Network+ Guide to Networks, 5th...

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