Chapter 12: Wide Area Networks
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Place your cursor at the end of a question and hit Enter into. This will place you in the Answer style. This has already been done pertaining to Part a) of Query 1 . Test Your Understanding Inquiries
1 . a) Distinguish between LANs and WANs. 
b) What are privileges of approach? 
c) What are providers? 
d) Why do you possess more overall flexibility with LOCAL AREA NETWORK service than with WAN assistance? Why?  2 . a) Why are common WAN rates slower than typical LOCAL AREA NETWORK speeds? Provide a clear and complete argument. 
b) How come future WAN prices difficult to predict? 
c) Review the selection of systems in LANs and WANs.  several. a) For what reason do MANs have larger typical rates of speed than broader-scope WANs? 
b) Happen to be LANs sole networks or internets? 
c) Will be WANs solitary networks or perhaps internets? 
d) Is definitely the Internet a WAN? 
4. a) List three basic aspects of wide place networks. 
b) Happen to be access backlinks wired or wireless? 
c) Precisely what is CPE? (Do not just spell out the abbreviation. )  5. a) What two technologies are used in business community loops? [377-379]
b) What two solutions are used in residential community loops? 
c) Assess the two regional loop UTP technologies in terms of number of pairs and voice-grade versus data-grade wiring top quality. [377-379]
d) Compare the kinds of UTP found in corporate properties and in low-speed PSTN leased lines. 5, 19[377-379]
e) Is all UTP wiring limited to 75 meters? Make clear. 5, 19 six. a) Clarify the difference between access lines and rented lines. 
b) Review dial- up connections with leased collection connections over the dimensions proven in Determine 10-7.  7. a) Below what speed is there different rented line requirements in different parts of the world? 6,21 
b) What is the exact speed of a T1 line? 
c) Precisely what are the speeds of similar leased lines in European countries? 
d) What get link transmitting media do T1 and E1 lines use? 6,21
e) What access link transmission channel do almost all higher-speed leased lines require? 6,21
f) Why are fragmentary; sectional T1 and E1 rates of speed desirable? 6,21
g) List common fractional T1 rates of speed. 6,21
h) What is T1/E1 bonding, and why is it desirable?
i) Exactly what the most traditionally used leased lines? 
almost 8. a) What leased range standards are used above 55 Mbps? 
b) Precisely what is the lowest-speed SONET/SDH rented line? 
c) Why does 10 Gbps Ethernet use a speed of 9, 953. 28 Mbps on " 10 Gbps” WAN backlinks?  on the lookout for. a) Why are DSL contacts likely to be more affordable than classic leased series connections? 
b) Are business DSL service speeds symmetric or perhaps asymmetric? Explain. 
c) What are the downstream and upstream rates of HDSL, HDSL2, and SHDSL? 
d) Work, residential, or perhaps both DSL services present quality-of- assistance guarantees? 
e) What is the most effective DSL normal? 
f) Why is VDSL difficult to beat the additional standards?  10. a) Why is asymmetric speed suitable in home DSL support? 
b) What is the advantage of not rendering quality-of-service guarantees to residential DSL buyers? 
c) Does home DSL present simultaneous voice-data service? 
d) What equipment will the customer need to add to his or her home? 
e) What is the purpose of the DSL get multiplexer? 
f) Assess rated downstream speeds intended for ADSL at first and today. 
g) Compare rated upstream speeds to get ADSL primarily and today. 
h) What three factors reduce real user throughput? 
i) Why is fibers to the home attractive? 
j) Assess fiber for the home unit installation with yanking optical dietary fiber to businesses for high-speed leased lines.  10. a) What transmission mass media do cable television companies...
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