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【试题71-75】

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发表于 2018-3-21 13:38:50 | 显示全部楼层 |阅读模式



routingin circuit-switching networks has traditionally involved a static routingstrategy with the use of (71)paths to respond to increased load . modern routing strategies provide moreadaptive and flexible approaches . the routing function of a packet-switchingnetwork attempts to find the least-cost route through the network , with costbased on the number of (72)expecteddelay , or other metrics in virtually all packet-switching networks , some sortf adaptive routing technique is used . adaptive routing algorithms typicallyrely on the ( 73 ) informationabout traffic conditions among nodes . in most cases , adaptive strategiesdepend n status information that is ( 74 ) at one place but used at another . there is a tradeoff here tweenthe quality of the information and the amount of ( 75) . the exchanged information itself a load on the constituentnetworks , causing a performance degradation
71  A . only       B. single           C . alternate     D.series
72  A. hops        B . sites           C . members       D . points
73. A. exchange    B . transportation  C . reception      D . transmissio
74  A .rejected    B. collected        C. discarded      D.transmitted
75  A . packets    B.information       C.data           D. overhead _

参考答案:71B72A73A74B75A

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