[单选题]A receiving host has failed to receive all of the segments that it should acknowledge.What can the host do to improve the reliability of this communication session?

正确答案 ：E

Decrease the window size

解析：解析：Explanation:

[单选题]帧中继环境中，在物理端口上，建立子接口的命令是（）

正确答案 ：B

interface

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