Which statement correctly describes Secure Shell (SSH) usage?

Which statement correctly describes Secure Shell (SSH) usage?

• A. It is used to securely log in to a remote server
• B. It is a web server
• C. It is a graphic design tool
• D. It is a DNS management protocol

Answer: (A)

SSH is a protocol designed for securely logging into and administering a remote machine over an encrypted channel. Its main value is protecting everything that travels between you and the remote system—from login credentials to commands and output—so it cannot be read or tampered with by outsiders. It relies on strong authentication, often using public-key cryptography, though password-based login is also possible, and by default uses the secure port 22. This setup not only enables remote command execution and management but also supports secure file transfer (like SFTP) and tunneling for additional security. Therefore, the statement that SSH is used to securely log in to a remote server best captures its purpose. It isn’t a web server, a graphic design tool, or a DNS management protocol, which are unrelated to SSH’s function.

SSH is a protocol designed for securely logging into and administering a remote machine over an encrypted channel. Its main value is protecting everything that travels between you and the remote system—from login credentials to commands and output—so it cannot be read or tampered with by outsiders. It relies on strong authentication, often using public-key cryptography, though password-based login is also possible, and by default uses the secure port 22. This setup not only enables remote command execution and management but also supports secure file transfer (like SFTP) and tunneling for additional security.

Therefore, the statement that SSH is used to securely log in to a remote server best captures its purpose. It isn’t a web server, a graphic design tool, or a DNS management protocol, which are unrelated to SSH’s function.