NETWORKS

NETWORKS

1. WAN

   • a network that spans a large area or multiple organisations
     • wide area network

2. LAN

   • a network in a small area or single organisation
     • small area network

3. DISADVANTAGES OF NETWORKS

   • networks are expensive
     • expertise is needed to set up and maintain a network
   • problems such as viruses can affect every computer on the network

4. NETWORKS ALLOWS COMPUTERS TOO:

   • share files so the same filees are available whcheve comuter you use
   • share resources such as printers and internet connection

5. BUS TOPOLOGY

   • cheap to install
   • high chance of catastrophic faliure
   • lots of collisions
   • slows down as more computers are added

6. IP ADRESS

   • an IP adressis a unique value assigned to every computer on a network, used to identify it
   • the internet is a huge network with more devices than its possible to assigned and buisnesses

7. INTERNET

   • its a giant mesh of computers
   • multiple routes in two nodes
   • impossible to break the internet as another route is always there
   • cost is is assigned yo each connection in a mesh
   • route finding algorithms are used to find the lowest cost route between two nodes
   • data is split into small chunks called packets
   • each packet is sent along the lowest cost route