题目内容

Because TCP only acknowledges bytes up to the first missing byte in the stream, TCP is said to provide ____ acknowledgements.

A. Cumulative
B. Selective
C. Single
D. Negative

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Fast retransmit means in the case that ____ duplicate ACK-s are received, the TCP sender resend segment before timer expires.

A. 3
B. 4
C. 5
D. 6

TCP____ means sender won’t overflow receiver’s buffer by transmitting too much, too fast.

A. Flow control
B. Congestion control
C. Reliable data transfer
D. Connection-oriented service

TCP provides flow control by having the sender maintain a variable called the ____.

A. Receive window
B. Congestion window
C. Sliding window
D. buffer

How does TCP sender perceive congestion?

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