oing so (protocol)software applications that retrieve and send information and allow users access information.There are three common methods of accessing the Internet:Dial Up ModemDedicated LineMobile ConnectionDial Up Modem: First, the most common method for individual computers to connect to the Internet is via dial up modem, which is used to provide a connection to an ISP-- Internet Service Provider over normal telephone lines:Dedicated Line: Another method for computers to connect is through a dedicated line. Companies may use a dedicated communications link connection, such as an ISDN-- telephone company land-lines or On Ramp-- a utility to connect to an ISP or the main link (backbone) of the telecommunications carrier. The dedicated line allows you to connect to an ISP or the main link (backbone) of their telecommunications carrier. Mobile: Mobile users can connect to the Internet through mobile phones or via satellite using a portable satellite transceiver. This section has provided an analysis of the physical means to transfer data. Now that we know the physical means to transfer data, the next section discusses the physical requirements for the Internet to work.What is Required for the Internet to Work?The following physical requirements are needed for the Internet to work:ClientsServersRoutersPacketsClients: Clients communicate with a WWW server using the Hypertext Transfer Protocol (HTTP). Thus, when you select a WWW link, the client looks up the hostname and makes a connection with the WWW server. Then the HTTP software on the server responds to the client's request and the client and the server close the connection. Servers: For applications to work, there must be computers to provide e-mail and Web services. Servers run server applications that store and transmit e-mail messages, as well as distribute Web page content. Other servers provide additional support services such as identification of computers by nam...
