Internet Connectivity

Internet Connectivity

1. Bluetooth

   • Bluetooth is a wireless technology
   • It allows all kinds of gadgets and devices like PDA's, smartphones, mice and keyboards,etc;to share information.
   • Some examples are sharing music on your phone, MP3 player with a radio or printing from your mobile phone.
   • -Only works over short distances
   • +great for quick sharing.

2. Wireless

   • Allows you to use your laptop or device any where you can find a signal
   • - if using 3G or 4G streaming can be very expensive and hard to control.
   • + no need for cables
   • - connectivity distance from the wireless access point is limited
   • Dongles can be put in the USB ports and allow you to connect to the internet.

3. Dial-up

   • Computer is connected to a modem (modulator-demodulator) which is then connected to a phone socket
   • Modem converts the digital signals the computer uses into ones that are compatible with those used on telephone lines.
   • - you can't use your phone while you're on the internet.
   • Can't use your phone and computer at the same time
   • +can be used where broadband is unavailable

4. Sattelite

   • Doesn't require cables
   • Suits people who are far away from phone lines.
   • The computer links to a satellite in geostationary orbit using signals sent to and from an aerial connect to a computer
   • - no connection and the usage prices are very high
   • +no need for expensive cables

5. Fibre-optic

   • +it's very reliable
   • signals are able to travel long distances without getting weaker
   • - expensive to install the cables
   • +provides a constant high speed link
   • the cables use light

6. Broadband

   • Uses digital signals so there's no need for a modem
   • - upload time is longer than download time
   • +you can download a lot of data quickly
   • The ADSL can be copper or fibre-optic
   • Connection is by an Asymmetrical Digital Subscriber Line(ADSL)
   • - there is a greater risk of hacking

7. Internet

   • A huge network of networks
   • Came way before the www
   • A networking infrastructure
   • The internet is to the www as roads are to traffic

8. WWW(world wide web)

   • The part of the internet that is made up of websites
   • Each website is made up of one or more web pages.
   • The idea of the www was put forward by many people. One of them being Tim Berner Lee

9. GIS(Geographical Information System)

   • Used within archaeology, land surveying, agriculture, etc;
   • uses a combination of hardware, software, and data to manage analyse and display all kinds of geographical data.
   • This data can be shown in the form of maps, charts or reports.
   • A GIS can be used within may ways.