Can you explain what the SSH protocol is and what it is used for?

SSH (Secure Shell) is a network protocol that provides secure access to remote computers over insecure networks.

Main functions of SSH:

• Data encryption to protect against interception.
• User authentication (passwords, keys).
• Secure execution of commands on a remote server.
• Port forwarding and tunneling.

Example of use: an administrator connects to a remote server via SSH to perform configuration or software updates, with all data transmitted in encrypted form.