What is meant by SSH?

Secure Shell (SSH) is a cryptographic network protocol for secure data communication, command line interface logins, remote execution commands, and other network services between two computer networks.

What is SSH and its function?

SSH is a remote login replacement application like telnet, rsh, and rlogin, which is much safer. The main function of this application is to access the machine remotely. Just like telnet, SSH Client provides Users with Shell for remote to the machine.

What is meant by VPN?

VPN itself is used as a private connection through public networks, especially in the case of the internet. Like a network that is in the office so that its users can be connected to each other within the scope of just one network.