COMPUTER NETWORKING

TRANSPORT LAYER

TRANSMISSION CONTROL PROTOCOL TCP

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The first SYN message in the three-way handshake
A
initial sequence number
B
check sum
C
sequence number
D
SYN
Explanation: 

Detailed explanation-1: -Step 1. Device A (Client) sends a TCP segment with SYN = 1, ACK = 0, ISN (Initial Sequence Number) = 2000. An Initial Sequence Number (ISN) is a random Sequence Number, allocated for the first packet in a new TCP connection.

Detailed explanation-2: -A three-way handshake is also known as a TCP handshake or SYN-SYN-ACK, and requires both the client and server to exchange SYN (synchronization) and ACK (acknowledgment) packets before actual data communication begins.

Detailed explanation-3: -Initial sequence numbers (ISN) refers to the unique 32-bit sequence number assigned to each new connection on a Transmission Control Protocol (TCP)-based data communication. It helps with the allocation of a sequence number that does not conflict with other data bytes transmitted over a TCP connection.

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