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Chapter Summary

  • The Internet backbone is made up of a number of metropolitan area ethernets (MAEs).

  • Connection to an MAE is provided by a network access point (NAP). Communications companies such as Sprint operate NAPs.

  • Internet access providers (IAPs) provide connections to MAE NAPs.

  • Internet service providers (ISPs) provide a full complement of Internet services, including e-mail and Web hosting.

  • When selecting an ISP, you should consider issues such as the ISP's service, redundant connections, and proximity to an NAP.

  • Any of the WAN technologies can be used to connect to an ISP or an IAP, including T lines, Frame Relay, and DSL. Cable television companies also offer cable modem connections to the Internet.

  • Domain names are procured from domain registration providers.

  • IP addresses can be obtained from your ISP or, for large corporations, directly from ARIN.

  • Microsoft Windows Me, Windows 2000, and Windows XP offer Internet connection sharing, which allows you to connect a number of computers to the Internet using one Internet connection.

  • Proxy servers provide a barrier between trusted networks and untrusted networks. Proxy servers can provide Web page caching, Network Address Translation, and some firewall capabilities.

  • Network Address Translation allows you to masquerade a number of computers through one "legal" IP address.

  • Proxy servers that supply NAT, such as the AnalogX Proxy Server, provide a way for small networks to connect to the Internet through one ISP connection.



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