CompTIA Network+ (N10-009) — Question 348

A network administrator needs to disable all inbound and outbound telnet traffic in the network. Which of the following ports should the administrator disable?

Answer options

• A. 23
• B. 53
• C. 123
• D. 443

Correct answer: A

Explanation

The correct answer is A, port 23, as it is the default port used by telnet for communication. The other options are incorrect because port 53 is for DNS, port 123 is for NTP, and port 443 is used for HTTPS, none of which relate to telnet traffic.