TRANSPORT LAYER
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which Flag bit in TCP header must be set when a TCP entity wants to terminate a connection?
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RST
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ACK
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FIN
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SYN
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Explanation:
Detailed explanation-1: -A TCP connection is terminated using FIN segment where FIN bit is set to 1. There is a well established TCP connection between the client and server. Client wants to terminate the connection.
Detailed explanation-2: -TCP uses a three-way handshake to establish a reliable connection. The connection is full duplex, and both sides synchronize (SYN) and acknowledge (ACK) each other. The exchange of these four flags is performed in three steps: SYN, SYN-ACK, ACK, as shown in Figure 5.8.
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