Networks

Networks

1. disadvantges

   • viruses can spread very easily
     • as if one computer gets a virus its spreads to all computer
       • meaning you will need to get a anti virus or new equpiment if a virus spreads
   • very expensive to keep up
     • because of amount of cables and new equipment needed

2. advantges

   • computers can easily communicate
   • can share passwords and usernames
   • share progammes

3. types of networks

   • bus
     • advanteges
       • cheap to install
     • disadvantges
       • high chance of collinsons
       • only has one cable so has a high chance of failure
   • ring
     • disadventges
       • diffuicult to add computers
       • only one cable leading to high chance of failure
     • adventages
       • cheap to install
       • no collinsons
   • star
     • disadventages
       • expenisve
       • failure of switch meaning entere system is down
     • adventages
       • fast not many collinsons
       • easy to add computers
       • low chance of big failure

4. ip address

   • what is it
     • a unique number that helps computers know who they are
       • there is 4 billion different ip address that can be used
         • so the internet uses every lan has they unique number so mail never gets sent to the wrong computer

5. internet

   • packets
     • All data on the Internet is split up into small chunks so it can be sent easily called packets
   • routing
     • Route-finding algorithms are used to determine which route through the mesh will have the lowest cost, and therefore take least time
   • mesh topology
     • Rather than using a star, bus or ring topology, each node is connected to one or more other nodes in an ad-hoc manner