Which of the following tools would be used to securely administer and configure various network devices?

Telnet is an insecure protocol that transmits data, including login credentials, in plain text, making it vulnerable to eavesdropping and interception.

HTTP (Hypertext Transfer Protocol) is primarily used for web browsing and is unencrypted, meaning data sent over it can be easily intercepted.

SIMMFV1 is not a recognized standard or tool for network device administration; it appears to be a fabricated or incorrect option.

SSH (Secure Shell) provides a secure, encrypted channel for remote command-line access and administration of network devices, protecting credentials and data in transit. It uses cryptographic protocols to authenticate the client and server and encrypt the entire communication session, making it suitable for sensitive administrative tasks.