Networks

Networks

1. Advantages

   • you can share files
   • you can share your recources
   • you can share logins and don't need a set one for each computers

2. Disadvantages

   • Virus can spread quickly
   • Expensive to set up
   • Need experience to set up

3. Types of Networks

   • WAN
     • Wide area network
       • A network that spans a large area or multiple organisations
   • LAN
     • Local area network
       • A network in a small area or single organisation

4. Topologies

   • bus
     • advantages
       • cheap to install
     • disadvantages
       • lots of collisions
       • slows down more when you add more computers
       • high chance of catastrophic failure
   • ring
     • advantages
       • no collisions (fast)
       • cheap to install
     • disadvantages
       • high chance of catastrophic failure
       • diffacult to install
   • star
     • advantages
       • low chance of failure
       • no coliltion
     • disadvantages
       • expensive
       • depends on a switch

5. Ip adress

   • An IP adress is a unique value assigned to every computer on a network used to identify it
   • Message on an network have an IP adress attached witch is how a computer knows whether or not keep the message
   • The internet is a huge network with more device than its possible to assign a unique adress to
   • Unique adressis are assined to businessis and houses
   • These houses and buisneses run their own mini-network inside with diffrent IP adresses

6. internet

   • The internet is a giant mesh of computers
   • It is impossible to break the internet , since another route can always be found
   • there are multiple diffrent routes between any two nodes
   • a cost is assigned to each conection in a mesh
   • route-finding algorithmes are used to find the lowest cost rewt between two nodes
   • data is split into small chuncks called packets
   • each packet is sent along the lowest costing route
   • the packets are re-asembled on the other side