net works

net works

1. advantages

   • share logins
   • acess to anything from all computers
   • share files
   • share resorces

2. types

   • WAN
   • LAN
   • star
   • bus

3. disadvantages

   • icreased risk
     • viruses can affect all the computers
   • very expensive
   • can slow down as more computers are added
   • difficulty
     • expertise is required

4. topologys

   • bus
     • advantages
       • easy to use
       • cheep to install
     • disadvantages
       • high chance of catastrofic error
       • lots of collisions
   • ring
     • disadvantages
       • high chance of catastrophic fallier
       • difficult to expand
     • advantages
       • cheep to install
       • no collisions
   • star
     • advantages
       • no collisions
         • fast
       • low chance of failier
     • disadvantages
       • expensive
       • depends on a switch

5. IP address

   • what is an IP address? it is a unique value on a network used to identify the user
     • it must be unique because if not messages will be sent to the wrong people
   • messages on a network have an IP address attached
   • 4 billion IP addreses

6. the internet

   • mesh of computers
   • multiple routes between 2 nodes
   • it is imposible to break it
     • there is alwase anoughther route to be found