network

network

1. disadvantages

   • takes a lot of time to set up.
   • if there are any errors it can lead to all computers going down
   • expensive
     • hard to maintain

2. What is a network?

   • They allow computers to...
     • Share files
     • Share resources
     • Share logins

3. Types of network

   • LAN
     • Local area network
   • WAN
     • Wide area network

4. topology

   • bus
     • cheap and easy to set up
     • High chance of catastrophic failure. Lots of collisions. Slows down as more computers are added.
   • Ring topology
     • Cheap to install. No collisions.
     • High chance of catastrophic failure. Difficult to add new computers
   • Start apology
     • Fast. Easy to add new computers. No chance of catastrophic failure
     • Expensive. Failure of the switch will take down the network.

5. IP address

   • Is a unique value assigned to every computer on a network used to identify it.
   • Messages on a network have a IP address attached which is how a computer knows weather or not to keep it.
   • What has an IP address?
     • Phone, I pad, computer.
     • Smart tv, laptop, speaker

6. Packets

   • Data is split into small chunks called packets each packet is sent along the lowest cost rate the packets are reassembled on the other side

7. Mesh topology

   • In mesh apology there is excellent resilience to outages as messages can take many different routes to reach a destination
   • If any node or connection becomes unavailable the message can simply take a different route
   • There are multiple different routes between any two notes it’s impossible to break the Internet since another room can always be found route finding algorithms are used to find the lowest cost route between two nodes