【名词&注释】
网络通信(network communication)、低碳钢(low carbon steel)、网络设备(network equipment)、证券市场(securities market)、办公室(office)、伪“满洲国”、傀儡政权(puppet state power)、不符合(inconformity)、一个中心(one center)、不允许(not allow)
[单选题]Astute service providers realize that the continued support of legacy X.25 and asynchronous network element using separate operations network is cost(16).For example,the maintenance of multiple networks can require additional staff. Often, this staff must be trained on multiple vendor technologies, sometimes requiring parallel groups specializing in each (17) .Hence, additional maintenance procedures must be maintained and administrative records are (18) .The duplication of transport facilities to carry (19)network traffic is an inefficient use of resources. And not surprisingly, more technologies installed in a central office means the necessity for more physical space, and an increase in power connections and power consumption migration of these (20) network elements to IP-based DCns is alogical strategy.
A. B
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