CompTIA Network+ (N10-008) — Question 192

Network traffic is being compromised by DNS poisoning every time a company's router is connected to the internet. The network team detects a non-authorized DNS server being assigned to the network clients and remediates the incident by setting a trusted DNS server, but the issue occurs again after internet exposure. Which of the following best practices should be implemented on the router?

Answer options

• A. Change the device's default password.
• B. Disable router advertisement guard.
• C. Activate control plane policing.
• D. Disable unneeded network services.

Correct answer: A

Explanation

Changing the device's default password is crucial because it prevents unauthorized access to the router, which can lead to DNS poisoning. The other options, while they may improve security, do not directly address the immediate risk of unauthorized access that is likely causing the DNS issues.