Chapter 10
1) A network that runs on the customer premises is a ________. A) LAN B) WAN C) Both A and B D) Neither A nor B
A
10) Which of the following usually offers higher speeds? A) MANs. B) WANs. C) Both A and B are about equal in typical speeds.
A
40) Fiber to the home service is normally created by ________. A) running optical fiber to neighborhoods B) running individual fiber cords from the nearest switching building to individual homes C) Both A and B D) Neither A nor B
A
52) Metropolitan area Ethernet is used primarily ________. A) in MANs B) to link sites in distant cities C) Both A and B D) Neither A nor B
A
56) The use of virtual circuits ________. A) reduces costs B) improves reliability C) Both A and B D) Neither A nor B
A
58) Frame Relay frames contain ________. A) destination addresses B) virtual circuit numbers C) Both A and B
B
9) Which of the following has more diversity in technologies? A) LANs. B) WANs. C) Both A and B are about equal in diversity of technologies.
B
30) What transmission medium do ALL DSL services use? A) One-pair data-grade UTP. B) Two-pair data-grade UTP. C) One-pair voice-grade UTP. D) Two-pair voice-grade UTP.
C
63) An MTSO ________. A) controls cellsites in a cellular system B) links mobile users to wired telephone customers C) Both A and B D) Neither A nor B
C
65) Cellular technology was created to support more customers in a single area.
TRUE
17) Carrier access lines to residential buildings typically use ________. A) one-pair voice-grade UTP B) two-pair voice-grade UTP C) two-pair data-grade UTP D) four-pair UTP
A
20) Leased lines are ________. A) point-to-point lines between two premises B) always on C) Both A and B D) Neither A nor B
A
21) Leased lines standards are most different around the world at speeds ________. A) below about 50 Mbps B) above about 50 Mbps C) Leased line speeds around the world are about equally different in both speed ranges.
A
22) T1 leased lines run at a speed of about ________. A) 250 kbps B) 1 Mbps C) 10 Mbps D) 45 Mbps
A
49) Which of the following is in Frame Relay's speed range? A) 10 Mps. B) 100 Mbps. C) Both A and B D) Neither A nor B
A
50) Which of the following offers speeds that match speed range of greatest corporate demand for WAN transmission? A) Frame Relay. B) ATM. C) Both A and B D) Neither A nor B
A
57) In ________, switching decisions are based on destination addresses. A) Ethernet B) PSDNs that use virtual circuits C) Both A and B D) Neither A nor B
A
59) Using the Internet as a WAN is attractive because of ________. A) the Internet's low cost per bit B) the Internet's service quality C) Both A and B D) Neither A nor B
A
6) A company has more control over its ________ technology. A) LAN B) WAN
A
60) Service quality issues with the Internet can be addressed by using ________. A) a single ISP B) multiple ISPs
A
61) In cellular technology, a ________ is a small geographical area. A) cell B) cellsite C) Both A and B D) Neither A nor B
A
64) Cells are used in cellular telephony to provide ________. A) service for more customers B) greater reliability C) greater speed D) All of the above
A
7) LAN speeds are faster than WAN speeds. This is because of ________. A) technological limitations B) regulatory limitations C) the slow corporate adoption of newer WAN technologies D) economics
A
70) When a cellular customer moves from one city to another, this is ________. A) roaming B) a handoff C) Both A and B D) Neither A nor B
A
76) According to the ITU, which of the following can be advertised as 4G? A) LTE. B) HSPA+. C) Both A and B D) Neither A nor B
A
13) The Internet is a ________. A) LAN B) WAN C) Both A and B D) Neither A nor B
B
14) Which of the following does the carrier NOT own? A) The network core. B) Customer premises equipment. C) Both A and B D) Neither A nor B
B
16) Local loop access lines to business use which of the following transmission media? A) 1-pair data-grade UTP. B) Optical fiber. C) Both A and B D) Neither A nor B
B
23) E1 leased lines run at a speed of about ________. A) 250 kbps B) 2 Mbps C) 34 Mbps D) 45 Mbps
B
31) Which of the following already runs to nearly all customer premises? A) 4-pair UTP. B) 1-pair VG UTP. C) 1-pair DG UTP. D) None of the above
B
32) Which of the following DSL services tend to be symmetric in speed? A) Residential. B) Business. C) Both A and B D) Neither A nor B
B
33) Which of the following DSL services usually offers QoS guarantees? A) Residential. B) Business. C) Both A and B D) Neither A nor B
B
37) In ADSL, the residential customer needs a(n) ________. A) DSLAM B) ADSL modem C) Both A and B D) Neither A nor B
B
44) Two-way amplifiers are needed for cable ________ service. A) television B) data C) Both A and B D) Neither A nor B
B
66) If I use Channel3 in a cell, I can reuse that same channel in an adjacent cell with ________. A) traditional cellular technology B) CDMA C) Both A and B D) Neither A nor B
B
24) SONET/SDH lines use ________. A) optical fiber B) high-quality forms of data-grade UTP C) Both A and B D) Neither A nor B
A
25) Which of the following is a fractional T1 line speed? A) 128 kbps. B) 1 Mbps. C) Both A and B D) Neither A nor B
A
69) When a cellular customer moves from one cell in a city to another cell in the same city, this is ________. A) cell switching B) a handoff C) cell hopping D) roaming
B
71) Which of the following is true? A) "Roaming" means the same thing in cellular and 802.11 networks. B) "Handoff" means the same thing in cellular and 802.11 networks. C) Both A and B are true. D) Neither A nor B is true.
B
74) Which of the following offers true 4G speeds? A) LTE. B) LTE Advanced. C) HSPA+. D) All of the above
B
78) On what full 4G standard are carriers converging? A) LTE. B) LTE Advanced. C) HSPA+. D) None of the above
B
27) Which of the following are more widely used? A) T1 lines. B) SONET lines. C) Both are used about equally.
A
38) For ADSL service, which of the following typically must be added to the telephone system? A) A DSLAM. B) A transmission line to the customer premises. C) Both A and B D) Neither A nor B
A
4) Companies use carriers for WAN transmission because ________. A) companies lack rights of way B) carriers have extremely strong security C) Both A and B D) Neither A nor B
A
11) LANs are ________. A) single networks B) internets C) Either A or B D) Neither A nor B
C
12) WANs are ________. A) single networks B) internets C) Either A or B D) Neither A nor B
C
15) Low-speed leased lines use ________ transmission lines to the customer premises. A) one-pair voice-grade UTP B) one-pair data-grade UTP C) two-pair data-grade UTP D) four-pair UTP
C
19) Which of the following go from one customer site to another customer site? A) Leased lines. B) Access lines. C) Both A and B
C
2) A LAN is a network that ________. A) links different sites together B) provides service within about a mile C) provides service within a site D) All of the above
C
26) In the United States, to get a leased line of at least 2.5 Mbps. Your access line would be ________. A) T1 B) Fractional T1 C) Bonded T1s D) None of the above
C
45) Leased line switched WANs typically use ________. A) leased lines B) a router at each site C) Both A and B D) Neither A nor B
C
46) A firm uses a PSDN. It has four sites. How many leased lines will it need? A) None B) 1 C) 4 D) None of the above
C
47) In a PSDN, companies connect to the network core at ________. A) NAPs B) Public/Private access points C) POPs D) DSLAMs
C
48) The PSDN transport core normally is drawn as a cloud ________. A) because it has no internal structure B) for security reasons C) because customers do not need to care about what is inside it D) All of the above
C
54) Why is metro Ethernet popular? A) Familiarity. B) Rapid reprovisioning. C) Both A and B D) Neither A nor B
C
55) Why is metro Ethernet popular? A) It uses a familiar technology. B) It has attractive prices. C) Both A and B D) Neither A nor B
C
73) For surfing websites on the Internet, what is the lowest generation of cellular service that would provide at least reasonably good access? A) 1G. B) 2G. C) 3G. D) 4G.
C
77) HSPA+ is a ________ service. A) 1G B) 2G C) 3G D) 4G
C
84) Combining multiple WAN technologies into a collectively managed system is called having ________. A) SNMP B) network visibility C) a virtual WAN D) WAN optimization
C
75) According to the ITU, which of the following offers true 4G speeds? A) LTE. B) HSPA+. C) Both A and B D) Neither A nor B
D
18) UTP transmission is normally limited to about 100 meters.
FALSE
29) The slowest offered SONET/SDH leased lines run at about 50 Mbps.
FALSE
34) ADSL offers symmetric service.
FALSE
62) In cellular technology, a cellsite is a small geographical area.
FALSE
67) If I use Channel3 in a cell, I can reuse that same channel in an adjacent cell with traditional cellular technology.
FALSE
68) If I use Channel3 in a cell, I can reuse that same channel in an adjacent cell with CDMA cellular technology.
FALSE
72) "Handoff" means the same thing in cellular and 802.11 networks.
FALSE
79) By regulation, cellular systems must give almost the same throughput at different times during the day.
FALSE
8) WAN prices are closely related to carrier costs.
FALSE
80) By regulation, cellular systems must give almost the same throughput at different places in their service areas.
FALSE
28) All SONET/SDH leased lines run faster than 50 Mbps.
TRUE
39) DSL throughput is typically sensitive to distance from the nearest switching building.
TRUE
42) To deliver signals to individual residences, cable television companies primarily use coaxial cable.
TRUE
5) The general name for a company that is given rights of way to lay wires through public areas is carrier.
TRUE
53) Metro Ethernet offers relatively high speeds and low costs.
TRUE
81) Cellular carriers are happy when flat fee users use a corporate 802.11 LAN to place calls instead of using the carrier network.
TRUE
82) Some smart phones can act as wireless access points.
TRUE
83) To use your smartphone as a wireless access point today generally will require you to pay a larger monthly fee.
TRUE
43) In coaxial cable, the two conductors ________. A) run side-by-side B) are twisted around each other C) Both A and B D) Neither A nor B
D
51) ATM ________. A) offers speeds in the range of greatest corporate demand B) is relatively inexpensive C) Both A and B D) Neither A nor B
D
3) A WAN is a network that ________. A) links different sites together B) provides service within about a mile C) provides service within a site D) All of the above
A
35) Which of the following DSL services does not offer QoS guarantees? A) Residential. B) Business. C) Both A and B D) Neither A nor B
A
36) In ADSL, the customer should have ________. A) splitters B) an ADSL modem C) Both A and B D) Neither A nor B
C
41) For their transmission medium, cable television companies primarily use ________. A) 2-pair VG UTP cabling B) 2-pair DG UTP cabling C) coaxial cable D) 4-pair UTP
C