Networks

Networks

Disadvantages
1. Very expensive to run
2. Higher risk of being hacked
3. Hard to set up
4. If one cable is broken the entire system crashes
Types of networks
1. WAN
  1. Wide Area Network
  2. A network in a large area or multiple organisations
2. LAN
  1. Local Area Network
  2. A network in a small area or a single organisation
Advantages
1. Files can be accessed from any computer on the network
2. Share printers and internet
3. Use the same login details anywhere on the network
Topologies
1. Bus
  1. Disadvantages
    1. High chance of failure
    2. Lots of collisions
    3. Slows down when more computers are added
  2. Advantages
    1. Cheap
2. Star
  1. Advantages
    1. low chance of failure
    2. No collisions (fast)
  2. Disadvantages
    1. Expensive
    2. If switch breaks the whole system goes down
3. Ring
  1. Advantages
    1. Cheap
    2. No collisions
  2. Disadvantages
    1. High chance of failure
    2. Hard to expand
IP Addresses
1. A unique value assigned to every computer on a network, used to identify it
  1. There are more computers on the internet than IP addresses that exist so unique ones are assigned to businesses and houses
  2. IP addresses range from 0.0.0.0. to 255.255.255.255. So there are 4,228,250,625 unique IP addresses
The Internet
1. The internet is a mesh network
2. There are multiple routes between nodes
3. It is impossible for the internet to crash as there is always another route
4. when exporting big chunks of data it is split into packets

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	Created by Zoe Johnson about 2 years ago