What is meant by handshaking? Explain with neat diagram

Handshaking, in the context of computer science and telecommunications, is an automated process of negotiation that dynamically sets parameters of a communications channel established between two entities before normal communication over the channel begins. It follows the physical establishment of the channel and precedes normal information transfer.

It is usually a two-way process, hence the term "handshaking". The process involves the exchange of information between two devices about their capabilities, like speed and size of data packets. This exchange of information is necessary to establish rules for communication.

Here's a simple diagram to illustrate the process:

Device A ---------------> Device B (Sends a communication request)

Device A <--------------- Device B (Acknowledges and sends its capabilities)

Device A ---------------> Device B (Sends its capabilities)

Device A <--------------- Device B (Agrees on set parameters)

Device A ---------------> Device B (Starts normal communication)

In this diagram, Device A initiates the handshaking process by sending a communication request to Device B. Device B acknowledges the request and sends back its capabilities. Device A then sends its capabilities to Device B, and Device B agrees on the set parameters. After this, normal communication can begin between Device A and Device B.