Why we use computer networks?
1. Easily share documents
2. Share resources.
3. To communicate with other network users( Eg. E-mail, IM, video-conferencing ) .
If my network is connected to the Internet, I can,
1. Shopping online
2. Use online banking
3. Access large scale of information.
Business Applications of Networks
The client server model involves requests and replays.
Some home network applications with examples.
- Access to remote information (VNC, Team-viewer)
- Person to person communication(Skype, IM)
- Interactive entertainment.
- Electronic commerce.
In peer to peer network there are no fixed servers and clients.
Forms of e-commerce with examples.
1. Business to Consumer (Buy books form amazon.com)
2. Business to Business (Car manufacturer company buy Tires from tire company)
3. Government to Consumer(get Vehicle renewal license online)
4. Consumer to Consumer(ikman.lk)
5. Peer to Peer (Bit torrent, File sharing...)
1. Broadcast Links.
2. Point to Point links
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Inter process | Processors located |
distance | in same | Eg:
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1 m | Squire meter (PAN) Bluetooth
10 m | Room (LAN)
100 m | Building (LAN)
1 KM | Campus (LAN)
10 KM | City (MAN)
100 KM | Country (WAN)
1000 KM | Continent (WAN)
10,000 KM | Planet (Internet)
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