题目内容

Which of the following is not correct about Selective Retransmission protocol?( )

A. receiver individually acknowledges all correctly received packets
B. sender only resends packets for which ACK not received
C. It limits sequence number of sent but un-ACK-ed packets
D. It is not a pipelined protocol

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Which of the following about TCP connection is not correct?( )

A. It is a broadcast connection
B. It is a point-to-point connection
C. It is a pipelined connection
D. It is a full duplex connection

The SYN segment is used for____.

A. TCP connection setup
B. TCP flow control
C. TCP congestion control
D. Closing a TCP connection

The FIN segment is used for____.

A. TCP connection setup
B. TCP flow control
C. TCP congestion control
D. Closing a TCP connection

How does TCP sender perceive congestion?( )

A. Through a timeout event
B. Through a receiving duplicate ACK-s event
C. Both A and B
D. Either A or B

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