Flashcards
Networks
Cards in this deck (9)
- 1Factors which influence the choice of a network• Cost of a network
• Size of organisation
• How the system will be used
• Existing Systems
• Performace Required
• Security Issues - 2Costs associated with a network• Network Maintenance costs (Upgrades)
• Hardware Costs (cabling, file server)
• Software costs (Network Operating System)
• Cost of third party communication lines (BT, Virgin)
• Training Costs
• Staffing Costs (Netwrok Manager) - 3Advantages of peer-to-peer networking• Cost Saving (No server needed)
• No network manager is needed - all users take responsibility on the network
• Easy to set up
• There is no reliance on a server
• Lower operating costs - less setup and maintenance costs
• Peer responisiblity - users decided what resources other users can use on their computer - 4Disadvantages of peer-to-peer networking• Backups cannot be made centrally - you cannot be sure that all users will perform backups of their own data
• Users need more IT knowledge - as they are responsible for their own files on their computers
• Poorer security - users are responsible for deciding what they share
• Some computers may run slowly - those computers that have resources on them that all users use will run very slowly
• Users may experience difficulties in finding files
• Only suitable for very small networks - 5Advantages of client-server networks• Security is better - one person is responsible
• Centralised data - data is held on the file server
• Backups are taken centrally - regualr backups
• Faster access to programs and files
• Centralised Administration - usernames and passwords managed centrally so other users don't need to worry - 6Disadvantages of client-server networks• More expensive - servers are expensive
• Need specialist knowledge - need someone in charge of netwrok who knows about it
• Software is sophisticated and expensive
• If the server breaks down it renders the network unusable until it can be repaired - 7Features of a Ring Topology• All the computers are arranged in a circle
• Data sent by one computer passes around the ring until it reaches the correct computer - 8Advantages of a ring network• The netwrok is not dependent on a central computer
• Each computer has the same access as the others so no one computer can 'hog' the network - 9Disadvantages of ring netwrorks• If there is a break in the coonection then the whole netwrok fails
• Faults are difficult to locate
• It is impossbile to keep the network running whilst equiptment is added or removed
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- A Level Information & Communication Technology (Topic 1: Networks) Flashcards on Networks, created by Connor Wassall on 29/02/2016.
- Created by
- Connor Wassall
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