题目内容

工业机器人的维护保养时间间隔，要按照标准工作时间进行设定。

A. 对
B. 错

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A transport-layer protocol provides for logical communication between ____.

Application processes
B. Hosts
C. Routers
D. End systems

Transport-layer protocols run in ____.

A. Servers
B. Clients
C. Routers
D. End systems

In transport layer, the send side breaks application messages into ____, passes to network layer.

A. Frames
B. Segments
C. Data-grams
D. bit streams

Services provided by transport layer include ____.

A. HTTP and FTP
B. TCP and IP
C. TCP and UDP
D. SMTP