Networks

Networks

1. LAN

   • Local Area Netwok
   • Contained in the local area or organisation
   • In a single geographical location

2. WAN

   • Wide Area Network
   • An area that spans a large geographical area or aganisations.
   • Often consists of multiple LAN networks together

3. Advantages

   • You can use any computer
   • Everything you save will be saved to other computers also
   • Access your work from other computers

4. Disadvantages

   • Expensive
   • More room for error
   • Difficult
   • Malware

5. Bus topology

   • Advantage
     • Cheap to install.
   • Disadvantages
     • High chance of catastrophic failure
     • lots of collisions
     • Slows down as more computers are added

6. Ring topology

   • Advantages
     • Cheap to install
     • No collisions
   • Disadvantages
     • High chance of catastrophic failure
     • Difficult to expand

7. Star topology

   • Advantages
     • Low chance of failure
     • No collisions (fast)
   • Disadvantages
     • Expensive
     • Depends on a switch

8. IP Address

   • An IP Address is a unique value assigned to every computer on a network, used to identify it
   • Messages on a netwok have an IP Adress attached, which is how a computer knows whether or not to keep the message
   • The internet is a huge network with more devices than it's possible to assign a unique address to
   • Unique addresses are assigned to businesses and houses
   • These houses and businesses run their own mini-network inside with different IP Adresses