network

network

1. different types of network

   • lan
     • local area network
       • network just in one geographical place
   • wan
     • wide area network
       • network in multiple geographical place

2. advantages

   • all of your information will be transfered on to all of the other computers
   • you will be able to log on all of the computers with yuour password and username
   • all of your files will be on every computer
   • recourses like printers and internet will be connected to the network

3. disadvantages

   • the network is very expensive to set up on to the computers
   • the problems have a higher risk of increasing
   • it is very difficult to set up a network and an expertise will be needed

4. topologies

   • ring topology
     • is a network of computers all connected with one cable
       • advantages
         • cheap to install
         • there are no collisions so it is fast
     • disadvantages
       • there is a high chance of catastrophic failure
       • difficult to expand the network
   • star topology
     • is a network of computers with each containing a cable each.
       • advantages
         • low chance of catastrophic failure
         • no collisions so its fast
       • disadvantages
         • expensive
         • you have to depend on a switch
   • bus topology
     • is a range of computers that are connected to one wire
       • advantages
         • cheap to install
       • disadvantages
         • there is a high chance of catastrophic falure
         • more collisions
         • the more computers added the slower it gets

5. ip addressess

   • 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, which is how a computer knows weather or not to keep the message

6. internet

   • the internet is a huge network with devices than its possibe to assign to a unique address
   • unique addresses are assigned to businesses and houses
   • these houses and businesses run their own mini network inside with different ip addresses.

7. internet

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