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单选题

Traditional network layer packet forwarding relies on the information provided by network layer (本题) protocols, or static routing, to make an independent ()decision at each hop within the network. The forwarding ()is based solely on the destination ()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 ()toward a destination, the packets toward the destination might take one or both of them, resulting in some degree of load sharing.

A
switching
B
singnaling
C
routing
D
session
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答案:

C

解析:

题目描述的是传统网络层数据包转发在网络中的每个跳点都做出独立的路由决策,该决策依赖于网络层协议提供的信息或静态路由。因此,空格处应填入与路由决策相关的词汇。选项C “routing” 符合语境,表示路由选择。其他选项如switching(交换),signaling(信号),session(会话)与题目描述不太相关。

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