Networks

Networks

1. disadvanteges

   • expertise is needed to set up and maintain a network
   • problems like viruses can affect
   • networks are expensive to set up

2. types of networks

   • WAN
     • a network that spans a large area or multiple organisations.
   • LAN
     • a network is a small area or single oraniseation

3. advanteges

   • files are available on any computer
   • same username and password can be used on any computer that is on the network
   • all computes can use the same printer and internet connection

4. topology

   • bus
     • it consists of a single cable that runs through the network
       • advantages:
         • cheap to install
       • disadvantages
         • high chance of failure
         • lots of collision
   • ring
     • computers that connect to each other in a ring
       • advantages
         • cheap to install
         • no collisions (fast)
       • disadvantages
         • high chance of failure
         • difficult to expand
       • star
         • all computers are connected to a central switch
           • advantages
             • low chance of failure
             • no collisions
           • disadvantages
             • expensive
             • depends of a switch

5. IP ADRESSES

   • definition
     • an ip address is a unique value assigned to every computer on a network, used to identify it.
   • what is it for?
     • to identify each device
   • what does an ip address look like?
     • 86.188.242.210
   • how many IP addresses are there?
     • 4,949,672,96

6. internet

   • what kind of topology is it?
     • it is a mesh topology
       • it is impossible to break the internet since another route can always be found
   • how are routes chosen
     • they are chosen by how long it takes get to each node
   • how are large files sent
     • big files are broken down then reassembled at destination