TCP Handshake A TCP handshake is a crucial step in establishing a reliable communication channel between two computers. It involves two rounds of communicat...
TCP Handshake
A TCP handshake is a crucial step in establishing a reliable communication channel between two computers. It involves two rounds of communication, known as the "first handshake" and the "second handshake," to ensure that both sides agree on the terms of the connection, such as the port numbers, the encryption method, and the sequence of data packets.
First Handshake:
The client and server exchange their IP addresses, port numbers, and a random number called the "port hash."
The client then sends the "SYN" (SYN) handshake message, which includes the port numbers of both the client and server.
The server acknowledges the "SYN" message with an "SYN" response message, indicating that it has received the client's information.
Second Handshake:
The client sends a "SYN" message with the same port numbers it used in the first handshake.
The server, based on the client's information, responds with an "SYN" message, indicating that it is ready to receive the data.
The two computers then proceed with data exchange through a series of data packets, establishing the TCP connection.
Importance of TCP Handshake:
The TCP handshake establishes a secure and reliable communication channel, ensuring that the data packets are sent and received correctly.
It helps to prevent unauthorized access and eavesdropping by verifying the identity of the communicating parties and establishing a proper connection.
The handshake process also determines the maximum transmission unit (MTU) of the network, which is the largest data packet that can be transmitted over the connection