ICT - How computers connect to the internet
- Created by: lou9119
- Created on: 10-04-16 19:29
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- How computers connect to the internet
- What is the internet:
- -The internet is a global network of computers.
- -To use the internet you must subscribe to an Internet Service Provider (ISP)
- ISPs have servers that are permanently connected to the internet.
- Methods of connecting to the internet:
- Dial-up
- -The computer is connected to a modem which is then connected to a telephone socket.
- A modem = modulator-demodulator
- Advantages:
- It can be used where broadband isn't available
- Wherever there is a phone line
- Dis-advantages:
- Slow transfer speeds
- Can't use the phone while online
- To slow to watch video files
- -The computer is connected to a modem which is then connected to a telephone socket.
- Broadband
- -Uses digital signals so no modem. Connection is done by Asymmetric Digital Subscriber Line (ADSL)
- Advantages:
- Download data quickly
- Phone can be used
- No dial-up
- Several computers can be connected
- Dis-advantages:
- As local usage increases your speed will decrease
- The further you are away the slower.
- Risk of hacking
- Fibre-optic
- Advantages:
- It provides a constant high speed link
- Can be used for TV
- Realiable
- Dis-advantages:
- Expensive
- Don't reach everyone's home.
- Advantages:
- Wireless
- Advantages:
- No cables
- Portable
- Dis-advantages:
- Limited access
- Hacking
- Limited access
- Advantages:
- Satellite
- Advantages:
- No expensive cables
- Ideal for locations with no telephone line.
- Dis-advantages:
- It requires a line of sight path
- Signal lag
- Usage charges high
- Advantages:
- Dial-up
- Equipment Connectivity:
- -Bluetooth is wireless and is on your Personal Area Network (PAN)
- Geographical Information Systems:
- -A GIS uses hardware, software and data to manage, analyse and display geographical data.
- What is the internet:
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