To a router, a flow is a (1) of packets th

问题单项选择题

To a router, a flow is a (1) of packets that share the same characterstics, such as traveling the same (2) , using the same (3) , having the same kind of security, and so on. A router that suppors the handling of flow labels has a (4) table. The table has an entry for each active flow label; each entry defines the (5) required by the corresponding flow label.

1（）

A．sequence

B．stream

C．queues

D．flow

答案

参考答案：A

解析：

对于路由器来说，流就是一系列(sequence)具有相同特性的数据包，例如通过相同的路径(path)，使用相同资源(resources)，具有相同的安全等级，等等。对于支持流标签的路由器，要有一张流标签(flowlabel)表。这张表中有各条当前活跃的流标签的条目，每个条目定义了相应流标签的服务(services)要求。