A．stute service providers realize that the continued support of legacy X.25 and asynchronous network elements using separate operations networks is cost(71). 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(72)Hence, additional maintenance procedures must be maintained and administrative records are(73). The duplication of transport facilities to carry(74)network traffic is an inefficient use of resources. And, not surprisingly, more technologies installed in a central office mean the necessity for more physical space, and an increase in power connections and power consumption. Migration of these(75)network elements to IP-based DCNs is a logical strategy.

A．prohibitive

B．feasible

C．connective

D．special

[单选题,共用题干题] 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, thi

[单选题](A popular service that has attercted the interest of companies and has home users alike is the sending of voice signals over an IP-based network, such as the Internet. The practice of making telephone calls over the internet has had a number of diff

[单选题]An important partof the national government is the Foreign Service,[a branc

[单选题]An important partof the national government is the Foreign Service,[a branc

Educators should not only prepare students underline(20) a career but also help

[单选题]Industry classification systems from commercial index providers typically c

[判断题]Third Party Logistics providers typically specialize in integrated operatio

[判断题]Third Party Logistics providers typically specialize in integrated operatio

[主观题]A．You may not realize it，but you are doing much more than just studying，when you are at school． School is also the place where you learn to get along well with people． But this is not al-ways easy． What can you do if you just don-t like one of your c

[主观题]英特网内容提供商（Internet Content Providers，ICP）主要是因特网上提供各类信息和服务的网站。ICP企业又可细分为（）和（）。