Unit 1.4 Networks

Unit 1.4 Networks

1. Advantages of networks

   • Shared resources
   • Stores files on a server

2. Can be physically touched...

   • Servers,devices,cables,routers,satellites...
   • The INTERNET is on a device so you can touch it but The World Wide Web, you can't touch

3. Disadvantages of networks

   • Cables run faster than wireless (about 100-1000 mbps)

4. Bottleneck- wiring cabinet connected by one cable to the server creating traffic

   • Bottleneck is cheaper than fibre optic
   • To remove bottleneck replace with fibre optic
   • Ethernet cables
     • Cat 5-5e, Cat 6-6a
     • Work up to 185m

5. ARPANET

   • First ever network
   • Used in the cold war as a network between missile silos to respond straight away to missile attacks.

6. LAN and WAN

   • Local Area Network
     • Small Geographical Distance
     • Peer to peer : files are held locally
     • Has its own cabling and hardware
   • Wide Area Network
     • Large Geographical Distance
     • The biggest WAN is a global network connection aka. The Internet
     • Client-Server : All connected to one server
     • You don't necessarily own the device used

7. Data Protection Act

   • Floods Locks Are Always Kept Stylish Through Straighteners
     • Secure, physical and software
     • Transferred, can only be transferred to countries with robust DPA laws