POP - Networking
A point-of-presence (POP) is the location of an access point to the Internet. A POP necessarily has a unique Internet (Internet Protocol) address. Your independent service provider (Internet service provider) or online service provider (online service provider) has a point-of-presence on the Internet. POPs are sometimes used as one measure of the size and growth of an ISP or OSP.
A POP may actually reside in rented space owned by a telecommunications carrier such as Verio. A POP usually includes router, digital/analog call aggregator, server, and frequently frame relay or asynchronous transfer mode switches.