Network

Network

1. disadvantages

   • share files, so the same files are avaliable whichever computer you use
   • share logins so the username and password can be used on every compute on the network
   • share resources such as printers and internet connection

2. types of networks

   • LAN
     • local area network
     • a network contained in a single geographical location or organisation
   • WAN
     • wide area network
     • a large network of information that is not tied to a single location

3. disadvantages

   • cost;networks are expensive to set up
   • increased;problems such as viruses can affect every computer on the network
   • difficulty;experitise is needed to set up and maintain a network

4. topologies

   • bus
     • all devices in the network are connected by one central cable
     • cheap to install
     • catasrophic failures, collisions and is also slow
   • star
     • each device is connected to one central node also known as a hub
     • low chance of failure and no collisions so it will be fast
     • expensive and depends on a switch
   • ring
     • each device is connected to two other devices on either side of it
     • its cheap to install and no collision
     • catastrophic failures and difficult to expand
   • the arrangement of computers within a network

5. IP address

   • a unique value assigned to every computer on the network, used to identify it
   • Messages on a network have an IP address attached, which is how a computer knows wether or not to keep the messaga
   • a problem with IP addresses is there can be more than one of the same address at a time