CompTIA Network+ (N10-007) — Question 115

A Chief Information Officer (CIO) is concentrated about an attacker gaining administrative access to the company's network devices. Which of the following is the
MOST secure way to prevent this?

Answer options

• A. ACL allowing only HTTP
• B. ACL allowing only Telnet
• C. Out-of-band modem
• D. Out-of-band console router

Correct answer: D

Explanation

The correct answer is D, as using an out-of-band console router provides a separate management channel that is not exposed to the main network, significantly enhancing security. Options A and B only allow specific types of traffic (HTTP and Telnet, respectively), which could still be vulnerable to attacks. Option C offers some level of security but does not provide the dedicated management and control that an out-of-band console router does.