Using Junos Space Security Director, you want to configure a unique firewall policy for a...

The correct answer is C. device policy rules. In Junos Space Security Director, policy scope matters. A rule intended for one specific SRX Series device must be placed in a device policy, because Juniper defines a device policy as a firewall policy created per device and used when you want to push a unique firewall policy configuration per device. Security Director also distinguishes this from group policies, which are shared with multiple devices, and from all-devices policy rules, which are global in scope rather than device-specific.

Option A is wrong because all-devices prerules are global rules evaluated before device-specific rules; they are not intended for a unique single-device exception. Option B is wrong because group policy prerules apply to devices within a group, not to one individually targeted SRX firewall. Option D is wrong because all-devices postrules are still globally scoped, even though they occur later in policy order. The clean Security Director design is to use device policy rules when the policy must apply only to one SRX device. Reference topics: Security Director, firewall policy hierarchy, device policy, group policy, all-devices prerules/postrules.