What is the main reason a client would refuse Telnet access for remote control?

What is the main reason a client would refuse Telnet access for remote control?

• A. It requires complex passwords.
• B. It is not encrypted, so transmissions can be intercepted.
• C. It is slower than SSH.
• D. It only works on local networks.

Answer: (B)

The main issue is security: Telnet sends all data in plaintext, including usernames and passwords. Because nothing in the session is encrypted, anyone who can eavesdrop on the network path can read or capture the remote-control credentials and commands. That makes Telnet far too risky for remote access in most environments, so clients often refuse it in favor of encrypted alternatives like SSH, which provides confidentiality and integrity for the whole session. The other points aren’t the primary concern. Telnet’s password requirements aren’t inherent to the protocol itself, so complexity isn’t the core reason. The speed difference isn’t the central issue either—even if performance varies, the lack of encryption is the decisive vulnerability. And Telnet isn’t inherently limited to local networks; it can operate over broader networks, so that limitation wouldn’t justify refusal.

The main issue is security: Telnet sends all data in plaintext, including usernames and passwords. Because nothing in the session is encrypted, anyone who can eavesdrop on the network path can read or capture the remote-control credentials and commands. That makes Telnet far too risky for remote access in most environments, so clients often refuse it in favor of encrypted alternatives like SSH, which provides confidentiality and integrity for the whole session.

The other points aren’t the primary concern. Telnet’s password requirements aren’t inherent to the protocol itself, so complexity isn’t the core reason. The speed difference isn’t the central issue either—even if performance varies, the lack of encryption is the decisive vulnerability. And Telnet isn’t inherently limited to local networks; it can operate over broader networks, so that limitation wouldn’t justify refusal.