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Question

Connection establishment involves a .............. handshake.

A
One way
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B
Two way
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C
Three way
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D
None of the above
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Solution

The correct option is C Three way

Connection establishment involves a Three way handshake.

A three-way handshake is a method used in a TCP/IP network to create a connection between a local host/client and server. It is a three-step method that requires both the client and server to exchange SYN and ACK (acknowledgment) packets before actual data communication begins.

And again, the middle two flags happen in the same packet. As such three packets are involved in a full TCP connection initiation process. The three-way handshake is necessary because both parties need to synchronize their segment sequence numbers used during their transmission.

TCP Connection Establish and Terminate. To establish a connection, TCP uses a three-way handshake. Before a client attempts to connect with a server, the server must first bind to and listen at a port to open it up for connections: this is called a passive open. ... SYN-ACK: In response, the server replies with a SYN-ACK.

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.


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