Question

In this state, the terminating host acknowledges the last FIN and waits for the connection to close.

   In this state, the terminating host acknowledges the last FIN and waits for the connection to close.

A Practical Guide to Advanced Networking

A Practical Guide to Advanced Networking

Jeffrey S. Beasley,… 3rd Edition

Chapter 6, Problem 16

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Step 1

The first step in closing a TCP connection is the active close, where the initiating host sends a FIN (finish) segment to the receiving host. Show more…

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In this state, the terminating host acknowledges the last FIN and waits for the connection to close.

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Key Concepts

TCP Connection Termination

This concept involves the orderly shutdown of a TCP connection. During termination, both ends agree to close the connection, and a series of steps, including the exchange of FIN and ACK packets, ensures that data transmission finishes safely and no data is lost.

FIN Flag

The FIN flag is a specific control bit in a TCP segment that signals the sender's intention to cease sending data. When a host sends a FIN packet, it initiates the process of closing the connection for data transmission in one direction.

ACKnowledgment Mechanism

The acknowledgment mechanism in TCP involves sending an ACK packet to confirm receipt of a TCP segment, such as a FIN packet. This process ensures reliable communication by verifying that control information has been successfully received.

TIME-WAIT State

The TIME-WAIT state is a period after a connection is closed during which the socket remains active to ensure that delayed packets are properly discarded and that both ends of the connection have safely concluded communication. This state helps prevent issues from potential retransmissions lingering in the network.

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