CompTIA Network+ (N10-008) — Question 208

An engineer needs to restrict the database servers that are in the same subnet from communicating with each other. The database servers will still need to communicate with the application servers in a different subnet. In some cases, the database servers will be clustered, and the servers will need to communicate with other cluster members. Which of the following technologies will be BEST to use to implement this filtering without creating rules?

Answer options

• A. Private VLANs
• B. Access control lists
• C. Firewalls
• D. Control plane policing

Correct answer: A

Explanation

Private VLANs are ideal for isolating communication within the same subnet without the need for additional rules, allowing database servers to communicate with application servers. Access control lists and firewalls would require explicit rules to be set up, which contradicts the requirement. Control plane policing is primarily used for managing traffic to control plane resources, not for inter-server communication filtering.