Networks

Networks

1. Network Types

   • WAN Wide Area Network
     • WAN Networks can often be made of many LAN networks
     • Examples of WAN Networks are the the PSN network and the internet
   • LAN networks are Local Area Networks
     • An example of a LAN network is the schools network

2. Disadvantages

   • Viruses can easily affect every computer if one person makes a mistake
   • Networks cost a lot of time money and resources to work, some may require a technician

3. Advantages

   • With a network you can share work to other people in the network
   • you can have many computers and log into any one and have your progress
     • Without a network you can't do this

4. Bus Topology

   • The bus topology goes in one straight line, connecting to each computer on the way, like a real bus
   • Advantages
     • Its simple and cheap to install
   • Disadvantages
     • Its slow
     • High risk of collisions
     • High risk of catastrophic failure

5. Ring topology

   • The ring topology has all of the computers connected in a ring to avoid collisions
   • Advantages
     • No collisions
     • Cheap and easy
   • Disadvantages
     • High risk of catastrophic failure

6. IP addresses

   • An IP address is a unique address given to every computer in a network
   • Networks have an IP address and the computers have an internal IP address

7. Star Topology

   • All computers connect to one central point
   • Disadvantages
     • Expensive
   • Advantages
     • Fast
     • No collisions

8. The Internet

   • The internet is a large WAN network that spans the world as a mesh topology
   • Advantages
     • Anyone can join the internet easily
     • It can't be broken as there are too many links to other computers
   • Disadvantages
     • The one problem with the internet is that it needs many algorithms that calculate costs ect.

9. Mesh Topology

   • This is a topology that connects many computers in lots of different ways
     • Advantages
       • Simple and difficult to break
     • Disadvantages
       • can have collisions