An enclosure suitable for housing computer/network equipment for which controlled access is desirable. The enclosure has at least one, preferably two, enclosure doors secured by respective lock assemblies selected from a group consisting of a lock cylinder assembly, an electronic lock assembly, a quarter-turn latch assembly, a compression latch assembly, a folding T latch assembly, a lift and turn compression latch assembly, a pawl/cam action latch assembly, a multi-point latch assembly and a bolt assembly for securing to a rotary latch. Each lock assembly a securing mechanism, a lock actuating mechanism and a standard mounting plate so that the respective securing assemblies may be easily exchanged within a standardized opening in the respective enclosure doors. The respective lock actuating mechanisms are constructed and arranged to actuate the respective securing mechanisms.