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59 Cards in this Set
- Front
- Back
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An example of a client server architecture
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Star Network
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Star networks are suitable for…
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… Larger networks
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1.A new communication opportunitie offered to businesses by the introduction of computer networks
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Distributed database - so that all areas can access the same data at the same time
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2.A new communication opportunitie offered to businesses by the introduction of computer networks
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Centralised (client/server) database - so that data can be added from across the organisation
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3.A new communication opportunitie offered to businesses by the introduction of computer networks
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Intranet - to share a variety of information with all users at the same time via their desktop
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4.A new communication opportunitie offered to businesses by the introduction of computer networks
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Email - to communication with all employees
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5.A new communication opportunitie offered to businesses by the introduction of computer networks
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Tele/Video software - meetings can be arranged wihtout need to travel
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6.A new communication opportunitie offered to businesses by the introduction of computer networks
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Collaborative software - so that people can work on the sme document at the same time e.g. magazine
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7.A new communication opportunitie offered to businesses by the introduction of computer networks
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Ability to work in ny part of the company but still access your own desktop
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1.An advantage of a 'bus' network
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Cheap to cable, cost effective and easy to install cables
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2.An advantage of a 'bus' network
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Easy to add new machines
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3.An advantage of a 'bus' network
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Can have a server or run without one
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1.An disadvantage of a 'bus' network
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Will run slow if too many computers are added (maximum of 12 computers)
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2.An disadvantage of a 'bus' network
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If the bus cable develops a fault it will disable the whole network
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1.An advantage of a 'ring' network
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There is no dependence upon a central host/server
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2.An advantage of a 'ring' network
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Cheap to install as the cables cost less
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3.An advantage of a 'ring' network
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Each computer has the same access as others, so no one can dominate the network
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1.An disadvantage of a 'ring' network
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If there is a break in the connection then the whole network fails
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2.An disadvantage of a 'ring' network
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Faults are difficult to locate
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3.An disadvantage of a 'ring' network
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Its impossible to keep the network running whilst equipment is added or removed because there is only one path for the data to follow
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1.An advantage of a 'star' network
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Its suitable for large networks
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2.An advantage of a 'star' network
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It’s a client server architecture (server in the middle, clients around it)
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3.An advantage of a 'star' network
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If one cable fails the other computers can still be used
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4.An advantage of a 'star' network
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LOAD TOLERNT - Extra computers can be added without loss in performance as all computers have their own path to the hub (joining up box/switch)
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1.An disadvantage of a 'star' network
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Totally dependent on the central server
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2.An disadvantage of a 'star' network
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Expensive to cable
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3.An disadvantage of a 'star' network
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Expert planning and management is required
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1.A benefit of moving to a networked system
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Sharing data and peripherals
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2.A benefit of moving to a networked system
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Flexability, it can work anywhere on the network or even at home
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3.A benefit of moving to a networked system
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Centralised backup
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4.A benefit of moving to a networked system
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Centralised secuirty - access levels
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5.A benefit of moving to a networked system
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Easier management and control, prevents installations and missuse
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6.A benefit of moving to a networked system
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Remote help is possible
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1.A drawback of moving to a networked system
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Expert management is required to run a large network
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2.A drawback of moving to a networked system
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Careful planning needed to make sure the infrastructure is well designed
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3.A drawback of moving to a networked system
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Over reliance on the server can cause problems
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4.A drawback of moving to a networked system
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Danger of viruses/hacking due to the machines all being connected
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5.A drawback of moving to a networked system
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Expensive in terms of cabling, switches and servers
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1.A factor that should be taken into consideration when choosing a network for a company
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Cost of the network - initial purchasing of equipment
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2.A factor that should be taken into consideration when choosing a network for a company
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Cost of the network - Installation and training
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3.A factor that should be taken into consideration when choosing a network for a company
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Cost of the network - Maintenance / personal costs
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4.A factor that should be taken into consideration when choosing a network for a company
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Cost of the network - Size of the avalable budget will determine what can be done e.g. fibre optic
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5.A factor that should be taken into consideration when choosing a network for a company
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Cost of the network - Cable is faster but also more expensive
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6.A factor that should be taken into consideration when choosing a network for a company
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Cost of the network - Wireless systems are flexible but needs more maintenance
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1.A factor that should be taken into consideration when choosing a network for a company
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Size of the organisation - needs can range from a small local area network to a glabal wide area network
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2.A factor that should be taken into consideration when choosing a network for a company
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Size of the organisation - Some communications media are limited by the distance they have to travel
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3.A factor that should be taken into consideration when choosing a network for a company
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Size of the organisation - Amount of data processing required must also be considered
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A factor that should be taken into consideration when choosing a network for a company
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Existing systems to integrate - More often networks are not developed from scratch but need to fit in with existing systems, sometimes an extension is required for example when opening a new branch office opens, therefore any new network must fit in witht he exsiting operating systems and protocols
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A factor that should be taken into consideration when choosing a network for a company
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Existing systems to integrate - It must support any peripherals already in use e.g. bar code readers, printers etc.
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A factor that should be taken into consideration when choosing a network for a company
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Performance in terms of reliability, user friendliness, capacity and speed of processing - Different parts of the organisation may have different performance requirements e.g. a real-time e-commerce system may require greater speeds and capacity and secuirty than the in house payroll system
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1.A benefit of an wireless network
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Allows inexpensive local area networks to be set up without cables
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2.A benefit of an wireless network
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Allows people the freedom of working anywhere a signal can be received
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3.A benefit of an wireless network
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Ideal for networks in old listed buildings where cables would not be allowed to be installed
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4. A benefit of an wireless network
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Can be used all over the worls - global set of standards
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5.A benefit of an wireless network
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Health and safety - tidier desktop with no cables
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1.A disadvantage of an wireless network
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Power consumption is high which means laptops soon exhaust their rechargeable batteries
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2.A disadvantage of an wireless network
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There may be health problems in uaing Wi-Fi
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3.A disadvantage of an wireless network
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Secuirty problems even when encryption is used
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4.A disadvantage of an wireless network
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Wifi networks have a limited range (e.g. 150ft) and it can be interfered if wireless network signals start to overlap
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