Network Point of Presence

A Network Point of Presence (N-PoP) is a location where a network function is implemented as either a physical network function (PNF) or a virtual network function (VNF).

As defined by Network Functions Virtualization (NFV) ETSI Industry Specification Group (ISG) in the Network Functions Virtualisation (NFV); Terminology for Main Concepts in NFV.

A Point of Presence (POP) is the Network Interface Point between communicating entities. A PoP is located in a data-center that houses servers, routers, network, switches, multiplexers and other network interface equipment. PoPs are located at colocation centers and Internet exchange points. A PoP is the local access point for an Internet Service Provider (ISP). PoP consists of high-speed telecommunications equipment that  helps customers to connect to the internet via their ISPs.

For more information check out:
What is NFV?
Which is better NFV or SDN?
Why SDN or NFV Now?
Who is ETSI?