Secure Shell (SSH) is a network protocol that allows secure communication between two computers. It is commonly used for accessing remote servers and managing systems over an unsecured network. SSH encrypts the data exchanged, ensuring that sensitive information remains private and protected from eavesdropping. SSH operates through a client-server model, where the client initiates a connection to the server. Once connected, users can execute commands, transfer files, and manage network services securely. This makes SSH an essential tool for system administrators and developers who need to maintain and control remote systems safely.