This document provides information about computer networks including definitions of key terms and descriptions of different types of networks. It defines a computer network as a LAN/WAN used for cross-computer access and communications. It describes benefits of networking such as shared storage, sharing devices like printers, and easy backup of data on other computers. Disadvantages include viruses spreading more easily and networks being expensive to set up and maintain. Local and wide area networks are defined. Ring, star, and bus network topologies are described along with their advantages and disadvantages.

1. Computer Networks
Use the theory notes on the teach-ict.com website to help you
answer the questions below. Try to write the answers in your own
words.
Questions
1. What is a computer network?
A network is a lan/wan that is used for cross-computer access/communications
2. Describe three benefits of networking computers
1.shared storage
h2.sharing devices such as a printer
3.data easily backed-up on other computers and file server
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2. 3. Describe three disadvantages of networking computers
1.viruses can spread throughout the network
2.can be expensive to set up and maintain
3.is very complicated to maintain and keep running
4. Describe a Local Area Network (LAN)
A Lan (local area network) is “n” amount of devices connected together or working
through a central server
5. Describe a Wide Area Network (WAN)
A Wan (wide area network) is “n” amount of lan networks in a geographical location
that can pass information and communicate between one another
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3. 6. What is meant by the term ‘stand alone computer’?
A computer that is used without using a Lan or Wan
7. What is meant by the term ‘workstation’?
A specialised computer designed for specific uses
Draw a Ring Network and describe advantages and disadvantages of a Ring Network.
All information flows one way at high speeds.
If one device goes down then the whole network
does.
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4. Draw a Star Network and describe advantages and disadvantages of a Star
Network.
One node won’t stop it working.
Too much strain on centre hub can cause
the network to go down.
Draw a Bus Network and describe advantages and disadvantages of a Bus Network.
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