A typical Internet user surfs the Web. Between her and the ISP PoP is the access network.
Internet access service is offered by an Internet Service Provider (ISP). The ISP has the necessary equipment for connecting its subscribers to the Internet such as modem pool, access server, RADIUS server, and routers.
National ISPs usually distribute their equipment to many locations in order to be closer to their subscribers. They have many PoPs (Points of Presence) that let their subscribers dial a local number instead of a long distance number or connect over a shorter line. An ISP's PoP is the interface between the ISP and its subscribers.
Internet access is the way a subscriber connects her modem to her ISP's PoP. The connection may go through other operator's network, usually telephone network (if using dial-up or DSL modem) or CATVnetwork (if using cable modem).
National ISPs usually distribute their equipment to many locations in order to be closer to their subscribers. They have many PoPs (Points of Presence) that let their subscribers dial a local number instead of a long distance number or connect over a shorter line. An ISP's PoP is the interface between the ISP and its subscribers.
Internet access is the way a subscriber connects her modem to her ISP's PoP. The connection may go through other operator's network, usually telephone network (if using dial-up or DSL modem) or CATVnetwork (if using cable modem).
The following are common Internet access scenarios :
- Companies pay to telecom operators for leased line (E1/T1), satellite link, or radio link to connect their networks to their ISPs.
- Companies pay to telecom operators for leased line (E1/T1), satellite link, or radio link to connect their networks to their ISPs.
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