CompTIA A+ Core 1 (220-1201) — Question 86

Which of the following ports should a technician disable to increase the security of remote connectivity?

Answer options

• A. 22
• B. 23
• C. 25
• D. 53

Correct answer: B

Explanation

Disabling port 23, which is used for Telnet, enhances security as Telnet transmits data in plain text, making it susceptible to interception. Ports 22, 25, and 53 serve secure SSH, SMTP, and DNS functions respectively, and should generally remain enabled for their intended use.