Ch07 - Network+ Guide to Networks, 4th Edition Solutions 7...

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Network+ Guide to Networks, 4 th Edition Solutions 7 – 1 Network+ Guide to Networks, 4 th Edition Chapter 7 Solutions Review Questions 1. 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 2. What part of the PSTN acts as a bottleneck for data throughput? a. local loop 3. What is the purpose of ISDN’s D channel? b. to carry call session information 4. What can X.25 do that Frame Relay cannot do? d. provide error correction 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 links is the most reliable? d. SONET 8. Which of the following customers would a symmetrical version of DSL best suit? d. a radiology clinic that uploads and downloads real-time images to and from a hospital across town 9. What technique enables DSL to achieve high throughput over PSTN lines? a. data modulation 10. 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, 4 th Edition Solutions 7 – 2 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. OC1 12. Which two of the following are asymmetrical versions of DSL? a. ADSL d. VDSL 13. What technique does T1 technology use to transmit multiple signals over a single telephone line? b. time division multiplexing 14. The science museum where you work determines that it needs an Internet connection capable of transmitting and receiving data at 12 Mbps at any time. Which of the following T-carrier solutions would you advise? c. ten T1s
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Ch07 - Network+ Guide to Networks, 4th Edition Solutions 7...

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