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计算机
Frame Relay is simplified form of(51), similar in principle to(52), in which synchronous, frames of data are routed to different
Frame Relay is simplified form of(51), similar in principle to(52), in which synchronous, frames of data are routed to different
admin
2009-05-15
42
问题
Frame Relay is simplified form of(51), similar in principle to(52), in which synchronous, frames of data are routed to different destinations depending on header information.Packets are routed throught one or more Virtual Circuits known as(53). Most Virtual Circuits are(54), which means that the network provider sets up all DLCI connections at subscription time.(55)are also part of the Frame Relay specification. They privide a link that only lasts only as long as the session.
选项
A、Permanent Circuits
B、Permanent Virtual Circuits
C、Switched Virtual Circuits
D、Switched Circuits
答案
C
解析
帧中继是(51)的简化形式,其原理类似(52),在该网络上信息进行同步传输,根据消息头信息数据北路由到不同的目的地。包被路由通过一个或者更多的入我们所知道的(53)虚拟电路。大多数虚拟电路是(54),这意味着网络运营商要在约定的时间建立所有的DLCI连接。(55)这同时也是讯框传送网络规范的一部分。他们提供一个链接,该连接只能维持大约一次会议的时间。
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