The TCP sliding window
(A) can be used to control the flow of information
(B) always occurs when the field value is 0
(C) always occurs when the field value is 1
(D) occurs horizontally
Explanation: TCP uses a Sliding Window mechanism for the flow control of data in transit on a network. In Sliding Window, the sending device can send all packets within the TCP window size without receiving an ACK.
The receiving device should acknowledge each packet it received and after receiving the ACK from the receiving device, the sending device slides the window to right side.
So, option (A) is correct.
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