NETWORKS

NETWORKS

1. Types of networks

   • WAN
     • a network that that spams a large area or multiple people
     • wide area network
   • LAN
     • a network is a small area or single organisation
     • local area network

2. Advantages

   • SHARE FILES- so the same files are availiable on whichever computer you use
   • SHARE RESOURCES- such as printers and internet connection
   • SHARE LOGINS- so the same username and password can be used on veery computer on the network

3. Disadvantages

   • COST- networks are expensive to setup
   • INCREASED RISK- problems such as viruses can effect every computer on that network
   • DIFFICULTY- expertis is needed to set up and maintain a network

4. Topology

   • BUS
     • ADVANTAGES
       • cheap
     • DISADVANTAGES
       • high chance of catostrophic failure
       • lots of collisions
       • slows down as more computers re added
   • RING
     • disadvantages
       • difficult to expand
     • advantages
       • cheap
       • no collisions
   • STAR
     • disadvantages
       • expensive
       • needs switch
     • advantages
       • low chance of failure

5. IP networks

   • a unique value assigned to every computer on a network.

6. Internet

   • Giant mesh of computers
     • A cost is assigned to each connection in a mesh
   • Multiple different routes between any two nodes
   • It is impossible to break the internet