Networks

Networks

1. A network is a group of computers that are linked together.

2. Disadvantages

   • Expensive-extra hardware and wiring needed
   • More room for error- if something goes wrong it can affect every computer.
   • Difficult-it requires a technical expence
   • Malware-viruses + bad software spread

3. What it allows you to do?

   • You can log onto any computer in the school
   • Your files are available on every computer
   • You can print use the internet email on every computer

4. LAN- local area network

   • A network in a small area or single organisations

5. WAN-wide area network

   • A network that spans a large area or multiple organisations

6. Network topology is the arrangement of computers and other elements of a network

7. Bus topology

   • Advantage: cheap to install
   • Disadvantages: high chance of catastrophic failure lots of collisions slows down as more computers are added

8. Ring topology

   • Advantages: cheap to install, no collisions-only one computer is transmitting on each cable
   • Disadvantages: high chance of catastrophic failure, difficult to expand

9. Star topology

   • Advantages: low chance of failure, no collisions
   • Disadvantages: expensive, depends on a switch

10. Mesh topology

11. IP address

    • An IP address is a unique value assigned to every computer on a network, used to identify it.
    • An address is a unique identifier given to something

12. Messages on a network have an IP address attached which is how a computer knows whether or not to keep the message

13. Each computer in the school has an internal IP address which the internet can not see.

14. trying to find the fastest route