▶ 14.5 Enterprise Point of Presence
The point of presence (POP)—not to be confused with the POP3 email protocol—is the point at which the enterprise connects to its internet service. Some enterprises have several points of presence. In some cases, enterprises centralize all internet traffic so they may treat it all consistently. If the enterprise has multiple sites, all internet traffic flows to the POP via the enterprise VPN.
Internet Service Providers
Modern ISPs use a variety of technologies to connect to customers. Smaller sites may use the same technology as households: a broadband cable modem connection, optical fiber, or a DSL connection. Larger sites may use special, dedicated lines via either copper or optical connections. ...
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