Refer to the exhibit. An engineer is modifying an access control policy to add a rule to inspect all DNS traffic that passes through the firewall. After making the change and deploying the policy…

While specifying security zones is good practice, it would not inherently prevent Snort inspection if the traffic matches the rule otherwise and the action is 'Allow'.

The question implies the rule is for 'DNS traffic', meaning the port (53) is correctly identified; if the port were wrong, traffic would not match the rule at all, not just fail inspection.

Defining the source network is part of traffic identification for a rule, but not directly responsible for enabling Snort inspection once traffic matches a rule, as the action dictates inspection.

In Cisco FTD/FMC, an access control rule with the action 'Trust' bypasses all deeper inspection by the Snort engine, including intrusion policies, file policies, and malware inspection. For Snort inspection to occur, the rule's action must be 'Allow' (or 'Block' if inspection is followed by a block).