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Chapter 14 - ISPs and Network Connections
• Introduction • Internet Service Providers and Fees
– A charge for using the Internet (everyone pays this); can be a flat rate or per usage
– A charge for the connection to the Internet (paid to "phone company" for dedicated connection)
• Customer Connections Form the Last Mile • .Leased Circuits Are Expensive [$500-5000 USD]
(T-1, T-3, etc.)
Chapter 14 - ISPs and Network Connections
• Most Individuals Choose Dial-Up Access [requires modems]– Using the conventional telephone system to access the Internet
is extremely popular because it is the least expensive access technology.
• The Important Concept of Continuous Connectivity (Dedicated Circuit) – Usually higher-speed than dial-up – Instantaneous access and continous availablity (necessary for a
website to be available 24/7)
• Instantaneous Access Changes Use– A dedicated Internet connection that provides instantaneous
access 24/7 changes the way an individual views the Internet because it encourages frequent and casual use.
Chapter 14 - ISPs and Network Connections
• Newer Technologies Offer Inexpensive Dedicated Access – Cable Modems (uses existing cable-TV wiring) -
shared cable – xDSL (Digital Subscriber Line) - uses existing phone
lines – Wireless - uses cell phone technology
• Terms– ISP – dedicated line (T-1, T-3) – dial-up access – cable modem – ADSL – wireless access technology
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