Consider the three way handshake for TCP connection establishment Which of the following statements are TRUE? (S1) Loss of SYN + ACK from the server will not establish a connection (S2) Loss of ACK from the client cannot establish the connection (S3) The server moves LISTEN $rightarrow$ SYN ..... RCVD $rightarrow$ SYN ..... SENT $rightarrow$ ESTABLISHED in the state machine on no packet loss (S4) The server moves LISTEN $rightarrow$ SYN ..... RCVD $rightarrow$ ESTABLISHED in the state machine on no packet loss.

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Consider the three way handshake for TCP connection establishment Which of the following statements are TRUE? (S1) Loss of SYN + ACK from the server will not establish a connection (S2) Loss of ACK from the client cannot establish the connection (S3) The server moves LISTEN

A	S2 and S3 only
B	S1 and S4
C	S1 and S3
D	S2 and S4

Explanation:

Detailed explanation-1: -TCP uses the full-duplex connection to synchronize (SYN) and acknowledge (ACK) each other on both sides. There are three steps for both establishing and closing a connection. They are − SYN, SYN-ACK, and ACK.

Detailed explanation-2: -The TCP three-way handshake in Transmission Control Protocol (also called the TCP-handshake; three message handshake and/or SYN-SYN-ACK) is the method used by TCP set up a TCP/IP connection over an Internet Protocol based network.

Detailed explanation-3: -The short answer is because a two way handshake would only allow one party to establish an ISN, and the other party to acknowledge it. Which means only one party can send data. But TCP is a bi-directional communication protocol, which means either end ought to be able to send data reliably.

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