2. 计算机
  3. Open Shortest Path First(OSPF)is a (1)_____ routing algorithm that (2)____ work done on theOSI IS-IS intradomain routing proto

Open Shortest Path First(OSPF)is a (1)_____ routing algorithm that (2)____ work done on theOSI IS-IS intradomain routing proto

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问题 Open Shortest Path First(OSPF)is a  (1)_____ routing algorithm that  (2)____ work done on theOSI IS-IS intradomain routing protocol. This routing, as compared to distance-vector routing,requires  (3)_____  processing power. The  (4)_____algorithm is used to calculate mutes. OSPFrouting table updates only take place when necessary,  (5)______ at regular intervals.
(5)_____
A．but rather
B．rather too
C．rather than
D．rather that
选项 A、 
B、 
C、 
D、 
答案D
解析 开放的最短路径优先(OSPF)是一种链路状态(link-state)路由算法，它是源于(was derived from)OSI IS-IS域内路由协议。与距离矢量路由相比，它需要更强(more)的处理能力。Dijkstra算法是用来计算路由的。OSPF只在必要的情况才会更新，而不是(rather that)有规律地隔一段时间就更新一次
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