networks

networks

1. LAN

   • local area network
   • usually contained in one geographical area or building

2. WAN

   • wide area network
   • usually over a larger geographical area and usually multiple lans

3. DISADVANTAGES

   • networks can be easily hacked and once they hack one computer they can get all the information and access to all computers
   • viruses can spread easily across a network and have to be removed individually which costs money and lots man power for example if there was 300 computers that would take a long time
   • can be expensive to have a network

4. ADVANTAGES

   • you can share info easily and sofware
   • share resources such as printers and internet
   • all computers/software only need to be updated on one computer for all to be updated

5. NETWORK TOPOLOGIES

   • RING
     • cheap to install
     • no collisions(fast)
     • high chance of catastrophic failure
     • difficult to expand
   • STAR
     • low chance of failure
     • no collisions (fast)
     • expensive
     • depends on a switch. if it fails the computers are left/rendered useless .so is the switch
   • BUS
     • cheap to install
     • collisions tend/are to occur frequently
     • high chance of catastrophic failure
     • slows down the more computers added

6. IP ADDRESS

   • an ip address is a unique value assigned to every computer connected to a network to identify/single it out.
   • there are too many devices connected to thet internettt and not etnough ip addresses for them so buisnesses and houses eqach share their oqwn