Traditional network layer packet forwarding relies on the information provided by network layer (1) protocols,or static routin

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问题 Traditional network layer packet forwarding relies on the information provided by network layer  (1)  protocols,or static routing,to make an independent  (2)  decisions at each hop within the network.The forwarding  (3)  is based solely on the destination  (4)  IP address.All packets for the same destination follow the same path across the network if no other equal-cost paths exist.Whenever a router has two equal-cost  (5)  toward a destination,the packets toward the destination might take one or both of them,resulting in some degree of load sharing.
(5)

选项 A、paths
B、states
C、systems
D、connections

答案A

解析 参考译文
    传统的网络层的数据包转发依赖于网络层路由协议提供的信息,或静态路由,以独立的转发决定在每一跳网络内。转发决策完全基于单播IP地址的目的地。同一目的地的所有数据包在网络上按照相同的路径,如果没有其他的等价路径存在。每当一个路由器有两个相等的成本路径朝向一个目标,朝着目的地的数据包可能需要一个或两个,造成了一定程度的负载共享。
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