Network

Network

1. LAN

   • Local Area Network
   • A network in a single geographical location of organisation.

2. WAN

   • Wide Area Network
   • A network that has more than one geographical area.

3. A network is a group of computers connected together so they can communicate.

4. Advantages

   • You can communicate with other people easier.
   • Uploading data is easier.
   • User restrictions are much easier.
   • Saves time.
   • The same login or password can be used on any computer.

5. Disadvantages

   • Cost of network.
   • Security concerns.
   • Virus and Malware.
   • Lack of rebustness.
   • Lack of independence.

6. Topologies

   • Bus Topology
     • High chance of catastrophic failure.
     • Lots of collusions.
     • Slows down as more computers are added.
     • Cheap to install
   • Purple = disadvantages Pink = advantages
   • Ring Topology
     • High chance of catastrophic failure.
     • Difficult to expand.
     • Cheap to install.
     • No collisions(fast)
   • Star Topology
     • Low chance of failure.
     • No collisions(fast)
     • Expensive
     • Depends on a switch

7. IP address

   • Internet Protocol Address
   • Computers need an address to identify them.
   • Is a unique value assigned to every computer on a network, used to identify it.