单项选择题

TCP是因特网中的传输层协议,使用()次握手协议建立连接。

A.1
B.2
C.3
D.4

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单项选择题
确定网络的层次结构及各层采用的协议是网络设计中()阶段的主要任务。

A.网络需求分析
B.网络体系结构设计
C.网络设备选型
D.网络安全设计

单项选择题
听力原文:W: Tom must be in a bad mood today. He hasn't said half a dozen words all afternoon.M: Oh, really? That's not like the Tom we know.Q: What does the man imply?(15)A.Tom is usually talkative.B.Tom has a very bad temper.C.Tom has dozens of things to attend to.D.Torn is disliked by his colleagues.
A.
M:
B.
Q:
C.Tom
D.
B.Tom
E.
C.Tom
F.
D.Torn
G.
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