Secure Shell (SSH)is a protocol used tosecurely access remote devices over an unsecured network. It provides encrypted command-line access and is a lightweight and secure method of remote administration.
* A. Site-to-site VPNconnects entire networks, not just a single host.
* B. Telnetis not secure; it transmits data (including credentials) in plaintext.
* C. Consoleaccess is direct via serial cable, not remote.
#Reference:
CompTIA Network+ N10-009 Official Objectives: 2.6 - Configure and troubleshoot remote access.