Certified Information Systems Security Professional (CISSP) — Question 283

An access control list (ACL) on a router is a feature MOST similar to which type of firewall?

Answer options

• A. Stateful firewall
• B. Packet filtering firewall
• C. Application gateway firewall
• D. Heuristic firewall

Correct answer: B

Explanation

The correct answer is B, as a packet filtering firewall operates by controlling the flow of packets based on predefined rules, similar to how an ACL on a router filters traffic. The other options, such as stateful firewalls, application gateway firewalls, and heuristic firewalls, employ more advanced techniques and state tracking, which do not align with the basic functionality of an ACL.