PoP (Point of Presence)
A point-of-presence (PoP) is an access point to the Internet or into a carrier network. An Internet Service Provider (ISP) or carrier has a point-of-presence on their network or the Internet and probably more than one. In terms of Wide Area Networking, the number of PoPs a carrier has is important; if an organisation needs to connect many branches into a UK-wide network, it is important to be able to identify a PoP within a reasonable distance from each site to minimise the cost of tail circuits.
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