3-Way Handshake

                                                   3-way handshake

3-way handshake is a process by using TCP/IP to make connection between client and server.

Both client and server require synchronize & acknowledge packet to start the process.

Step 1 (SYN)-

In this client wants to establish a connection with server, so it sends a segment with SYN (Synchronize Sequence Number) which informs server that client is likely to start communication and with what should be sequence number to start.

Step 2 (SYN + ACK)-

Server responds to the client request with SYN-ACK signal.

ACK signifies the response of segment it received and SYN signifies with what sequence number it is likely to start the segments.

Step 3 (ACK)-

In the final part client ACK the response to the server and they both establish a reliable connection with which they will start the data transfer.