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?


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