CIS 150 Final Exam Review Sheet Multiple Choice Identify the ...

. DSLAM d. terminator____ 74. ISDN PRI uses ____ B channels and one 64-Kbps D channel.a. 10 c. 23b. 12 d. 32____ 75. A ____ aggregates multiple DSL subscriber lines and connects them to the carrier’s CO.a. terminal adapter c. smart jackb. DSLAM d. terminator____ 76. Broadband cable requires many subscribers to share the same local line, thus raising concerns about ____ andactual (versus theoretical) throughput.a. access c. noiseb. costs d. security____ 77. The data rate of a particular SONET ring is indicated by its ____, a rating that is internationally recognized bynetworking professionals and standards organizations.a. OC (Optical Carrier) level c. BRI (Basic Rate Interface)b. CIR (committed information rate) d. DS0 (digital signal, level 0)____ 78. A directional antenna issues wireless signals along a(n) ____ direction.a. open c. wideb. narrow d. single____ 79. ____ is a significant problem for wireless communications because the atmosphere is saturated withelectromagnetic waves.a. Attenuation c. Diffractionb. Fading d. Interference____ 80. In ____ wireless systems, the transmitting antenna focuses its energy directly toward the receiving antennawhich results in a point-to-point link.a. mobile c. fixedb. variable d. open____ 81. An 802.11g antenna has a geographic range of ____ meters.a. 20 c. 300b. 100 d. 330____ 82. ____ may use either the 2.4-GHz or 5-GHz frequency range.a. 802.11a c. 802.11gb. 802.11b d. 802.11n____ 83. ____ is an 802.11n network feature allowing the combination of multiple frames into one larger frame.a. Channel bonding c. Frame aggregationb. Channel aggregation d. Frame bonding____ 84. Most satellites circle the Earth ____ miles above the equator in a geosynchronous orbit.a. 100 c. 6,000b. 1240 d. 22,300____ 85. To establish a satellite Internet connection, each subscriber must have a ____.a. dish antenna c. dish pathwayb. line-of-sight antenna d. source pathway