Disable Server Response Inspection (DSRI) is a performance-oriented Security policy rule setting that instructs the firewall to skip Layer 7 content inspection — which includes both App-ID continuation and all threat signature matching — on the server-to-client leg of a session, regardless of the application or protocol in use. Once enabled on a rule, it applies uniformly to every session matching that rule, not selectively to HTTP; protocols such as SMB and FTP, which are chatty in the return direction and commonly the reason DSRI is enabled in the first place, are affected exactly the same way as any other server-to-client flow. This makes option C the accurate description: all server-to-client traffic on that rule bypasses threat inspection, full stop. This is precisely why DSRI carries an operational risk that engineers must weigh deliberately: attaching a Threat Prevention profile to the same rule does not re-enable inspection or " win out " over the DSRI setting in any direction, which eliminates options B and D — the two settings are not designed to arbitrate against each other, and DSRI simply takes precedence for the return traffic. Because of this, DSRI should only ever be applied to rules governing traffic to servers that are already fully trusted, since checking the box removes visibility into exploits, malware, and data returned from that server regardless of any other profile attached to the rule.