Fill in the blank with the appropriate term. The ___________ protocol is a feature of packet-based data transmission protocols. It is used to keep a record of the frame sequences sent and their respective acknowledgements received by both the users

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Fill in the blank with the appropriate term. The ___________ protocol is a feature of packet-based data transmission protocols. It is used to keep a record of the frame sequences sent and their respective acknowledgements received by both the users.

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Answer: Sliding Window

Explanation:

The Sliding Window protocol is a feature of packet-based data transmission protocols. It is used in the data link layer (OSI model) as well as in TCP (transport layer of the OSI model). It is used to keep a record of the frame sequences sent, and their respective acknowledgements received, by both the users. Its additional feature over a simpler protocol is that can allow multiple packets to be "in transmission" simultaneously, rather than waiting for each packet to be acknowledged before sending the next.In transmit flow control, sliding window is a variable-duration window that allows a sender to transmit a specified number of data units before an acknowledgment is received or before a specified event occurs. An example of a sliding window is one in which, after the sender fails to receive an acknowledgment for the first transmitted frame, the sender "slides" the window, i.e., resets the window, and sends a second frame. This process is repeated for the specified number of times before the sender interrupts transmission. Sliding window is sometimes called acknowledgment delay period.