Internet Service Provider (ISP)
Types of Internet Connections
DSL is a broadband services that allow computers to be connected to all times to the Internet over existing phone lines, without interfering with telephone services. DSL requires a special modern provided by the ISP.
ADSL uses an upgraded phone line, all digital technology and support simultaneous Internet processing and phone use. ADSL is optimized for the way many people use the internet- more downloads than upload. The line is asymmetric, because it has more capacity for data received by your computer (such as graphics, video, audio and software upgrades) than for data that you send (such as email and browser commands). ADSL is one of a family of DSL products.
Cable Modems :
Transmit the data over the cables that bring television to homes business. Many users share the bandwidth. This sharing can reduce the bandwidth available to each person when many use the system simultaneously.
ISDN is available from all local telephone companies. (Integrated Service Digital Network) provides Internet service over either digital or standard telephone lines. ISDN requires specialized hardware called a terminal adapter (TA). ISDN is an upgraded phone line that can be used for faster Internet access and for regular voice calls. Using one line you can talk on the phone while you are surfing the web. ISDN is all digital, which means that does not have to be converted to an analog signal.
Dialup Connection :
Dialup service uses a modern and phone line to dial into a (Point to Point Protocol) PPP account on an Internet providers computer. Most ISPs support moderns at speed of 14.4 kbps, 28.8 kbps, and 56 kbps. You connect only when you want to use Internet services and disconnect (hang up) when you are done. If a computer is connected to the internet, the user usually cannot receive voice calls during this time. If the voice calls do not connect, the Internet connection is interrupted. To prevent this users often install an extra phone line dedicated to Internet service.
Digital Satellite Systems or direct Broadcast satellite get internet information by satellite. We receive data from the Internet at a high speed via satellite. But to send data to the Internet you need a dialup connection and an ISP.
Web TV :
We can access the Internet by using your TV. To use web TV we need a TV receiver that connects both TV and to a phone line. We can both use TV screen as monitor and remote control to browse the web. With the optional keyboard you can send and receive data.
Wireless Internet Access :
It requires attaching a special radio modern to the laptop. To acquire satellite access satellite dish is needed.
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