Which protocol provides secure remote command-line access to servers?

Which protocol provides secure remote command-line access to servers?

• A. SSH (Secure Shell)
• B. FTP (File Transfer Protocol)
• C. Telnet
• D. RDP

Answer: (A)

SSH provides secure remote command-line access by creating an encrypted channel between your client and the server, so everything you type and receive is protected from eavesdropping and tampering. It authenticates you before giving shell access, using methods like passwords or public-key cryptography, which is especially important for strong security and automation. This focus on a secure interactive shell is what sets SSH apart from the other options. FTP is for file transfers and isn’t designed for interactive shells; Telnet sends data in plaintext, making it insecure for remote login; RDP offers graphical remote desktop access rather than a command-line shell.

SSH provides secure remote command-line access by creating an encrypted channel between your client and the server, so everything you type and receive is protected from eavesdropping and tampering. It authenticates you before giving shell access, using methods like passwords or public-key cryptography, which is especially important for strong security and automation. This focus on a secure interactive shell is what sets SSH apart from the other options. FTP is for file transfers and isn’t designed for interactive shells; Telnet sends data in plaintext, making it insecure for remote login; RDP offers graphical remote desktop access rather than a command-line shell.