Networks

Networks

1. disadvantages

   • cost:networkes are expensive to set up
   • increased risk:of problems such as viruses which effect the whole of the network(so every one on the system)
   • difficulty: networks for the whole system cost a lot to maintain and keep up to date

2. types of networks

   • there is a network called wan which stands for wide area network which means a network in multipule locations
   • lan stands for local area network which is a network contained in one location

3. Topology

   • bus topology
     • advantages:cheap to install
     • disadvantages:high chance of catastrophic failure,lots of collisions,slows down as more computors are added.
   • Ring Topology
     • Advantages:cheap to install,no collisions (Fast)
     • Disadvantages:high chance of catastrophic failure,difficult to expand
   • Star Topology
     • disadvantages: expensive,and depends on a switch if that goes down every thing does
     • advantages:low chance of failure,no collisions and it is fast
   • Mesh Topology
     • disadvantades:expensive,the wirring is impractical for many companies
     • advantages: it is faster, messages can be resived more quikely

4. advantages of networks

   • you can connect with people in a work place
   • you can all have the same file open at once

5. IP address

   • an IP address is a individual address for each computer so if a message is sent it will go only to that Address not to anyone else

6. Internet

   • packets definition:packets are the chunks of data that get split up in the internet then the packets are numbered and sent independently, the packets go through the cheapest routes even if they take forever
   • Routing definitions: routing is algorithms that are used to find which route will cost the least and work fastest.
   • Mesh Topology:a mesh topology is a network of different computers in a giant mesh, there are multiple routes between any two nodes and it is impossible to break the internet there for a route can be found