Networks

Networks

1. LAN

   • Local Area Network
   • Able to sustain and share a connection between local devices. Only selected devices can access a LAN
   • An example of a LAN is a school natwork

2. WAN

   • Wide Area Network
   • A WAN is a network that covers a very large area (multiple countries) and is unrestricted, so everyone can use it
   • Made up of multiple LANs
   • The internet a prime example of a WAN

3. Advantages

   • Can transfer data between devices on the network easily
   • Can share devices such as printers so less money needs to be spent of them
   • Communication between devices are quick and easy
   • Good Privacy

4. Disadvantages

   • Lots of staff might be needed to run the network which will cost money for you to employ or train
   • Networks are prone to viruses and are hackable which gives information to a hacker on a plate
   • Depending on the type of network, cost for equipment can prove expensive in the long run especially if any of it brakes

5. Network Topologies

   • Bus Network
     • All hardware is connected by a single cable (Computer printer servers etc.)
     • Cheap to create since not a lot of cable is needed and is very easy to install
     • Terminators are at each end of the wire to block unused signals
   • Star Network
     • Very reliable, if a cable brakes It won't disrupt other devices connected to the network
     • In center of a star network there is a Hub or Switch
     • Expensive to install, extra hardware such as the Hub or Switch fails there will be no network connection
   • Ring Network
     • Each device is connected to another 2 devices in the ring
     • Transfers data quickly because there is no traffic. All the data goes in a single direction
     • Network will go down if a single cable is damaged and unusable