What are two rulebase types within an IPS policy on an SRX Series device?

Answer: A D

An IDP policy can consist of two types of rulebases—an intrusion prevention system (IPS) rulebase and an exempt rulebase. A rulebase is a collection of rules. Rules contain a collection of configuration objects and are similar in structure to security policy because they use configuration objects to create match conditions and resulting actions. Once you create an IDP policy, the action of a security policy applies it. Although many IDP policies might exist within the configuration, only one IDP policy is active on a Junos security platform.