networks

networks

1. disadvantages

   • expensive - extra hardware and wiring needed
     • difficult- it requires a technical expertise
   • more room for error- if something goes wrong it can affect every computer
     • viruses spread around quicker

2. types of network

   • LAN
     • local area network
       • A network contained in a single geographical location or organisation
   • WAN
     • wide area network
       • A network that spans a large geographical area, or multiple organisations

3. advantages

   • you can print, use the internet, email and also use all the same software on any computer
     • your files will be saved, when you save them and will all be on another computer
       • you can log into any computer with the same password and email
       • every one can use the same resources
       • the wifi is connected to all computers

4. IP address

   • an IP address is a unique value assigned to every computer on a network, used to identify it
   • the network has 4 billion devices
   • computers on a network also need an address to identify them
     • when a computer is added to a network it is assigned an IP address
   • internet protocol address
     • each IP address should be unique

5. topology

   • ring topology-ADV= cheap, no collisions
     • ring topology-DISADV=still at risk of a failure or catastrophie
   • star topology-ADV=low chance failure, no collisions
     • star topology-DISADV= very expensive
   • bus network-ADV=very cheap
     • bus network-DISADV=very high risk of failure,high risk of collisions and is slower