NETWORKS

NETWORKS

1. Types of networks

   • WAN
     • WAN stands for wide are network which means it expands to different areas
   • LAN
     • LAN stands for local area network, this means network in one area.

2. advantages of networks

   • you can share files which means its the same files on whatever computer you use
   • share resorces such as printers and internet connection
   • share logins so the same username and password can be used in any computer

3. disadvantages of networks

   • the cost
   • increased risk
   • difficulty

4. topology

   • bus topology
     • bus topology is all on a single wire, its very cheap but a high risk of catastrophic faliure and collisions.
   • ring topology
     • this is a ring shaped network that is a bit more expensive than the bus topology. smaller risk of catastrophic faliure

5. star topology

   • shaped like a star. very expensive, most commonly used. no risk of catastrophic faliure or collisions.

6. IP addresses

   • Every IP address is unique
   • IP addresses are made up of ones and zeros
   • an address is a unique identifier given to something
   • messages on a network have an IP address attached to it
   • very expensive

7. internet

   • the internet travels around in things called packets
   • it is not possible to break the internet because no one can see it feel it
   • mesh topology
     • mesh is very good to have but a disadvantage is that its very complex to run and understand
     • the internet is made up of a giant mesh of computers
   • packets are printed and sent one their own