In a firewall policy database, which fields are described as fairly explanatory?

• A. Source and Destination
• B. Protocol and Port
• C. Action and Log
• D. Time and User

Answer: (A)

The main idea being tested is how to quickly read and understand what a firewall rule applies to. The Source and Destination fields are the most explanatory because they name the endpoints involved in the traffic—the origin and the destination. This gives an immediate, human-friendly picture of the rule’s scope, making it easy to grasp what traffic is being allowed or blocked.

Think of firewall rules in practical terms: “from this source to this destination, allow/deny.” That endpoint-to-endpoint view is the clearest description of what the rule cares about. Other fields add specificity but aren’t as outwardly descriptive of the traffic path. Protocol and Port tell you what kind of traffic is being considered (which services), but interpreting that often requires mapping ports to applications. Time and User add conditions or context, which refine when or for whom the rule applies, and Action and Log describe what happens to the traffic rather than which traffic is being described.