SSH can be set up using a pair of keys a public key that is stored on the SSH server, and a private key that is locally stored on the SSH client. SSH stands for Secure Shell, is commonly implemented using the client-server model one computer is called the SSH client and another machine acts as the SSH server. It is best used for accessing the remote servers when you use this SSH key and you will get the command-line interface of the server it is just like you sitting in front of the server which is situated far apart from you. SSH Protocol, thinks about protocol as rules of transferring encoded data over the network.
