networks

networks

1. advantages

   • low chance of failure
   • you can share files
   • easy to acsess

2. types of network

   • WAN
     • wan: wide area network
   • LAN
     • lan: local area network

3. disadvanages

   • viruses spread
   • expensive
   • lots of collisions

4. TOPOLOGIES

   • RING TOPOLOGY
     • ADVANNTAGES
       • cheap to install
       • no collisions
     • DISADVANTAGES
       • difficult to expand
       • high chance of catastrophic failure
   • BUS TOPOLOGY
     • ADVANTAGES
       • cheap to install
     • DISADVANTAGES
       • high chance of catastrophic failure
       • lots of collisions
       • slows down as more computers are added
   • STAR TOPOLOGY
     • DISADVANTAGES
       • expensive
       • depends on aswitch
     • ADVANTAGES
       • no collisions and works faster
       • low chance of failure

5. IP ADDRESSES

   • Messages on a network have an IP address which is how a computer knows whether or not to keep the message
   • An IP address is a unique valve assigned to every computer on a network used to identify it
   • IP= internet protocol
   • Addresses must be unique to tell the difference between computers and the messages sent to it.

6. the internet

   • there are multiple different routes between any two nodes
   • it is imposseible to break the internet since there is always another route
   • the internet is a giant mesh of computers
   • a cost is assigned to each connection in a mesh
   • route finding algorithms are used to find the lowest cost route between two nodes