Service Providers
There is a wide range of service providers in the Internet space. One way they differ is in their coverage areas. Some providers focus on serving a local area, others are regionally based, and others offer national or global coverage. Service providers also vary in the access options that they provide. All ISPs offer plain old telephone service (POTS), and some offer ISDN, xDSL, Frame Relay, ATM, cable modem service, satellite, and wireless as well. Providers also differ in the services that they support. Almost all providers support e-mail (but not necessarily at the higher-tier backbone level). Some also offer FTP hosting, Web hosting, name services, VPNs, VoIP, application hosting, e-commerce, and streaming media. Providers ...
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