IETF divided the PBNM architecture into four major function entities which are PolicyRepository, PMT (Policy Mangement Tool), PDP (Policy Decision Point) and PEP(Policy Enforcement Point).

• IETF 将策略网管系统划分为策略仓库、策略编辑器、策略决定点PDP (Policy Decision Point)、策略执行点PEP(Policy Enforcement Point)四个功能实体。