Developing Applications and Automating Workflows Using Cisco Platforms (DEVASC) — Question 252

Which protocol runs over TCP port 23?

Answer options

• A. SSH
• B. NETCONF
• C. HTTP
• D. Telnet

Correct answer: D

Explanation

The correct answer is D, Telnet, which specifically uses TCP port 23 for communication. SSH operates over TCP port 22, NETCONF can run over various ports but is not defined to use 23, and HTTP typically uses port 80, making them all incorrect options for this question.