题目内容

How does TCP sender perceive congestion?

A. Timeout
B. 3 duplicate ACK-s
C. Both A and B
D. None of above

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Transport protocols run in ____.

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

Which service does UDP not provide?

A. multiplexing
B. de-multiplexing
C. error-detection
D. error-correction

There are three major events related to data transmission and retransmission in the TCP sender, which one is not in it?

A. data received from application above
B. de-multiplexing segment
C. timer timeout
D. ACK receipt

The Internet’s _____is responsible for moving packets from one host to another.

A. application layer
B. transport layer
C. network layer
D. link layer