GATE CS 2017 Set 1 — Question 14

MCQ+1 / -0.33EasyTCP TeardownTransport LayerComputer Networks

Computer Networks → Transport Layer → TCP Teardown

Last updated 5 September 2026

Question

Consider a TCP client and a TCP server running on two different machines. After completing data transfer, the TCP client calls close to terminate the connection and a FIN segment is sent to the TCP server. Server-side TCP responds by sending an ACK, which is received by the client-side TCP. As per the TCP connection state diagram (RFC 793), in which state does the client-side TCP connection wait for the FIN from the server-side TCP?

Correct answer (D) FIN-WAIT-2 Solution 1. The client sends a FIN segment and enters the FIN-WAIT-1 state. 2. The server receives the FIN, sends an ACK, and enters the CLOSE-WAIT state. 3. The client receives the ACK for its FIN and transitions to the FIN-WAIT-2 state. 4. In FIN-WAIT-2, the client waits for the server to send its own FIN segment. Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (D) FIN-WAIT-2 Solution 1. The client sends a FIN segment and enters the FIN-WAIT-1 state. 2. The server receives the FIN, sends an ACK, and enters the CLOSE-WAIT state. 3. The client receives the ACK for its FIN and transitions to the FIN-WAIT-2 state. 4. In FIN-WAIT-2, the client waits for the server to send its own FIN segment.

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