networks

networks

1. advantages

   • -share files
   • share logins
   • share resources
     • printers
     • internet

2. disadvantages

   • cost
     • can be very expensive
   • increased risk
     • viruses
     • lagging
     • hacking
   • difficulty
     • takes time to set up
     • needs to be set up by professionals

3. types of network

   • WAN
     • wide area network
     • multiple areas
   • LAN
     • local area network
     • 1 geographical location

4. bus

   • positives
     • cheap
     • easy to set up
     • positives
   • negatives
     • slow
     • catastrophic failure
       • data collisoins

5. ring

   • postives
     • No data collisions
     • Easy to set up
     • Cheap
   • negatives
     • Slow
     • Catastrophic failure
     • Easy to intercept

6. Star

   • Positives
     • Fast
     • No data collisions
     • Efficient
     • Hard to hack
   • Negatives
     • Expensive
     • Hard to set up
       • Needs to be set up by professionals
     • Catastrophic failure

7. IP addresses

   • An IP address is a unique value assigned to every computer on a network, used to identify it
   • messages on a network have an IP address attached
     • this is how computer know whether or not to keep the message
   • ipv4
   • the internet is a huge network
     • there is more devices than its possible to assign one unique address
     • unique addresses are assigned to buisneses and houses
       • they run their own mini-networks
         • with different IP addresses
   • ipv6

8. the internet

   • the internet is a mech tropolgy
   • a cost is assigned to each connection is a mech
   • route finding algorithums are used to find the lowest cost route between two nodes
     • there are multiple different routes between any two nodes
   • the internet is a giant mech if computers
   • it is impossible to break the internet since another route can always be found
   • data is split into small chunks called packets
     • each packet is sent along the lowest cost route
       • the packets are re-assembled on the other side