ICT3.1 Networks

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Name the factors that influence the choice of a network. (x6)
Cost of Network, Size of Organisation, How the systems will be used, Existing systems, Performance required, Security issues.
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Name the costs associated with a network. (x7)
Network Maintenance Costs (upgrades), Hardware Costs, Staffing Costs (network manager), Training Costs, Software Costs, Cost of third party communication.
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Measures of Network Performance (x4)
Cost, Usability, Reliability, Speed.
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What is a Peer-to-Peer Network?
A network arrangement where each computer is of equal status.
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What are the advantages of a Peer-to-Peer network? (x6)
Cost saving - no server is needed, No network manager needed - all users take responsibility for the network, Easy to set up, There is no reliance on a server, Lower operating costs - less set up and maintenance costs, Peer responsibility.
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What are the disadvantages of a Peer-to-Peer network? (x6)
Backups aren't as easy to be made, Users need more IT knowledge, Poorer security - resources are shared, Some computers may run slowly - due to resources on computer, Users may find difficulty organising files, Only suitable for 15 or fewer users.
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What is a Client-Server network?
A network where several computers are connected to one or more servers.
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What are the advantages of a Client-Server network? (x5)
Security is better, Centralised Data, Backups are taken constantly, Faster access to programs, Centralised Administration.
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What are the disadvantages of a Client-Server network? (x5)
More expensive, Need specialist knowledge, Software is sophisticated, If a server breaks - the network breaks.
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Name the network topologies (x3)
Bus, Ring, Star.
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What is a 'bus' topology?
A bus topology is several computer connected with a backbone, where signals are passed on in either direction.
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What are the advantages of a 'bus' topology? (x3)
Cost effective because of the small cabling amount, Simple cable makes it easy to install, Easy to add extra devices.
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What are the disadvantanges of a 'bus' topology? (x2)
If more than 12 users are connected the performance degrades, If there is a break in the backbone the network can not be used.
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What is a 'ring' topology?
A ring topology is a Peer-to-Peer network as there is no server. All the computers are arranged in a circle. And data accessed is sent around the ring until it reaches the correct computer.
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What are the advantages of a 'ring' topology? (x2)
The network is not dependent on a central server/computer, Each computerhas the same access levels (peer-to-peer) so no one can 'hog' the netwot
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What are the disadvantages of a 'ring' topology? (x3)
If there is a break in the network it fails, Faults are difficult to locate, It is impossible to keep the network running whilst equipment is being added or removed as there is only one path for the data to follow.
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Other cards in this set

Card 2

Front

Name the costs associated with a network. (x7)

Back

Network Maintenance Costs (upgrades), Hardware Costs, Staffing Costs (network manager), Training Costs, Software Costs, Cost of third party communication.

Card 3

Front

Measures of Network Performance (x4)

Back

Preview of the front of card 3

Card 4

Front

What is a Peer-to-Peer Network?

Back

Preview of the front of card 4

Card 5

Front

What are the advantages of a Peer-to-Peer network? (x6)

Back

Preview of the front of card 5
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