The correct answer is A. Check Point Security Zones are used to simplify rulebase creation by assigning gateway interfaces to logical zones and then using those zone objects in the Source and Destination columns of the rulebase. The official R82 Security Management Administration Guide describes a typical network using ExternalZone, DMZZone, and InternalZone, and defines these as standard zone objects used to represent external networks, perimeter/DMZ networks, and protected internal networks. Option B is wrong because "PublicZone" is not the standard Check Point default zone object name in this context. Option C is wrong because "WanZone" is not the tested predefined zone name. Option D is wrong because the correct object is ExternalZone, not "Internetzone." The technical value of these objects is that policy can be written around network function rather than raw interface names or IP addresses. Reference topics: Object Management, Security Zones, InternalZone, ExternalZone, DMZZone.