题目内容

OSPF协议适用于4种网络。下面选项中,属于广播多址网络的是______,属于非广播多址网络的是______。

A. Ethernet
B. PPP
C. Frame Relay
D. RARP

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为了限制路由信息传播的范围,OSPF协议把网络划分成4种区域(area),其中______的作用是连接各个区域的传输网络,______不接收本地自治系统之外的路由信息。

A. 不完全存根区域
B. 标准区域
C. 主干区域
D. 存根区域

IPv6地址33AB:0000:0000:CD30:0000:0000:0000:0000/60可以表示成各种简写形式,以下写法中,正确的是______。

A. 33AB:0:0:CD30:/60
B. 33AB:0:0:CD3/60
C. 33AB∷CD30/60
D. 33AB∷CD3/60

Border Gateway Protocol(BGP) is inter-autonomous system ______ protocol. BGP is based ona routing method called path vector routing. Distance vector routing is not a good candidate for inter-autonomoussystem routing because there are occasions on which the route with the smallest ______ count is not thepreferred route. For example, we may not want a packet through an autonomous system that is not secure eventhough it is shortest route. Also, distance vector routing is unstable due to the fact that the routers announce onlythe number of hop counts to the destination without defining the path that leads to that ______. A router thatreceives a distance vector advertisement packet may be fooled if the shortest path is actually calculated throughthe receiving router itself. Link ______ routing is also not a good candidate for inner-autonomous system routingbecause an internet is usually too big for this routing method. To use link state routing for the whole internetwould require each router to have a huge link state database. It would also take a long time for each router tocalculate its routing ______ using the Dijkstra algorism.

A. connection
B. window
C. source
D. destination

Border Gateway Protocol(BGP) is inter-autonomous system ______ protocol. BGP is based ona routing method called path vector routing. Distance vector routing is not a good candidate for inter-autonomoussystem routing because there are occasions on which the route with the smallest ______ count is not thepreferred route. For example, we may not want a packet through an autonomous system that is not secure eventhough it is shortest route. Also, distance vector routing is unstable due to the fact that the routers announce onlythe number of hop counts to the destination without defining the path that leads to that ______. A router thatreceives a distance vector advertisement packet may be fooled if the shortest path is actually calculated throughthe receiving router itself. Link ______ routing is also not a good candidate for inner-autonomous system routingbecause an internet is usually too big for this routing method. To use link state routing for the whole internetwould require each router to have a huge link state database. It would also take a long time for each router tocalculate its routing ______ using the Dijkstra algorism.

A. routing
B. switching
C. transmitting
D. receiving

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