_____ imposes constrain on the rate at which a TCP sender can send traffic into the network.
A. sliding window
B. congestion window
C. receive window
D. variable window
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This job of delivering the data in a transport-layer segment to the correct socket is called ____.
A. multiplexing
B. de-multiplexing
C. forwarding
D. routing
If we define N to be the window size, base to be the sequence number of the oldest unacknowledged packet, and next-seq-num to be the smallest unused sequence number, then the interval [base, nextseqnum-1] corresponds to packet that ____.
A. can be sent immediately
B. have already been transmitted and acknowledged
C. cannot be used
D. have been sent but not yet acknowledged
The field of Length in UDP segment specifies the length of ____.
A. the UDP segment, not including the header
B. the UDP segment, including the header
C. the UDP segment’s header
D. the Length field
In TCP segment header, which field can implement the reliable data transfer?
A. source port number and destination port number
B. sequence number and ACK number
C. urgent data pointer
D. Receive window