Abstract: A system and method for interconnecting and enforcing policy between multiple disparate providers of application functionality, data centers or end-users. A network system comprising one or more Perimeter Points of Presence (P/PoP) configured to interconnect and enforce policy between a plurality of entities, each of which provides at least one function, the one or more Perimeter Points of Presence (P/PoP) comprising: a network interface component configured to accept physical or virtual connections or both; a plurality of functions layers for processing data, wherein the function layers can be configured to provide a customized virtual perimeter for the entities.