What is the purpose of Security Zones in rulebase creation?

The correct answer is A. Security Zones simplify rulebase creation by letting administrators write policy based on logical network areas rather than repeatedly referencing specific interfaces or address objects. A zone can represent internal, external, DMZ, or wireless network segments, and gateway interfaces can be assigned to those zones. Option B is wrong because enforcing user policies is primarily handled through Identity Awareness and Access Roles, not Security Zones alone. Option C is wrong because Threat Prevention is provided by Threat Prevention blades and profiles, not by zone objects themselves. Option D is wrong because monitoring is handled through logs, SmartView Monitor, SmartEvent, and related tools. The value of Security Zones is policy abstraction. A rule such as InternalZone to ExternalZone is easier to understand and maintain than many interface-specific rules, especially when network topology changes. Reference topics: Security Zones, Access Control rulebase creation, zone objects, network abstraction.