Network computer science 2020

Network computer science 2020

1. disadvantages

   • if one computer formatting breaks then the others will too
   • if you change a password on one computer it will only be changed on that one
   • cost
   • increased risk of viruses
   • needs experts to come and set it up

2. advantages

   • if you change your password on one computer it will change on all
   • share files
   • share resources

3. types of networks

   • LAN: Local Area Network
     • a network in a small area
   • WAN: Wide area network
     • a network that spans a large area

4. a network is a group of computers connected together so they can communicate

5. Network topologies

   • bus topologies
     • advantages:
       • cheap to install
     • disadvantages:
       • high chance of catastophic failure
       • high chance of catastrophic failure
       • slows down as more computers are added
   • star topologies
     • advantages:
       • low chance of failure
       • no collisions
     • disadvantages
       • expensive
         • expensive
       • depends on a switch
   • ring topologies
     • disadvantages
       • high chance of catastrophic failure, difficult to add new computers
     • advantages
       • cheap to install, no collisions

6. IP Addresses

   • IP Addresses are a unique value assigned to every computer on a network
   • are used to identify the gadget

7. The Internet

   • its a giant mesh of computers
   • a cost is assigned to each connection in a mesh
   • data is split up into small chunks called PACKETS
     • Each packet is sent along the lowest cost route
     • the packets are reassembled on the other side