Which protocol enables users to log on to another computer over the network and must be installed on the remote host?

Which protocol enables users to log on to another computer over the network and must be installed on the remote host?

• A. PPTP
• B. SSH
• C. VPN
• D. HTTPS

Answer: (B)

The ability to log into a remote machine securely over a network is provided by a service that runs on the target computer and accepts login sessions. SSH is built for this purpose: it offers secure, interactive remote logins, command execution, and file transfers. The remote host must have an SSH server installed to accept connections, while the client initiates the connection, authenticates (with passwords or keys), and then gains a shell or runs commands. All traffic is encrypted, making the session secure. PPTP is used for VPN tunneling, not for direct remote shell logins. VPNs create a secure channel for traffic but aren’t the standard mechanism for logging into a specific remote host. VPN technology is broader and doesn’t by itself provide an interactive remote login session. HTTPS, on the other hand, secures web traffic with TLS but is not designed for remote shell access to a host.

The ability to log into a remote machine securely over a network is provided by a service that runs on the target computer and accepts login sessions. SSH is built for this purpose: it offers secure, interactive remote logins, command execution, and file transfers. The remote host must have an SSH server installed to accept connections, while the client initiates the connection, authenticates (with passwords or keys), and then gains a shell or runs commands. All traffic is encrypted, making the session secure.

PPTP is used for VPN tunneling, not for direct remote shell logins. VPNs create a secure channel for traffic but aren’t the standard mechanism for logging into a specific remote host. VPN technology is broader and doesn’t by itself provide an interactive remote login session. HTTPS, on the other hand, secures web traffic with TLS but is not designed for remote shell access to a host.