Topic 1
- Created by: beckyxxsjd
- Created on: 14-05-15 19:34
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- Networks
- Factors when choosing a network
- Cost
- Size
- Usage
- Existing Systems
- Performance
- Security
- Peer to Peer
- Advantages
- Cost saving
- No network manager needed
- Easy to set up
- No need to rely upon a server
- Low operating costs
- Peer resonsibilty
- Disadvantage
- No central back up store
- Poor Security
- Users need more IT knowledge
- Computers may run slow if all users access the same resource
- Only suitable for small networks (15 or less)
- Advantages
- Client Server
- Advantages
- Fault tolerant
- Load tolerant
- Better security
- Centralised data
- Backups made by central server at regular intervals
- Centralised admin
- Faster access to programmes
- Disadvantage
- Much more expensive
- Needs a network manager
- Complex and sophisticated software is required
- If the server breaks down the whole network goes down
- Advantages
- Typologies
- Ring
- Advantages
- Network doesn't depend on a central server
- Every computer has the same access rights
- Disadvantage
- Faults are difficult to locate
- If there is a break in the connection the whole network goes down
- Cannot keep equipment running whilst equipment is added or removed from the network
- Advantages
- Bus
- Advantages
- Cost effective as you only need a small amount of cable
- Simple cable run makes it easy to install
- Disadvantage
- If more than 12 devices are connected then the network will run slow
- If there is a break in the backbone/main cable then all connected devices don't operate
- Advantages
- Star
- Advantages
- Fault tolerant
- Load tolerant
- Easy to add extra computers
- Disadvantage
- High initial start up cost
- Dependent upon the central hub
- Advantages
- Ring
- Wi-Fi
- Advantage
- Network can be set up without having to use lots of expensive cables
- People can work from anywhere as long as they can receive a wireless radio signal
- Ideal for old building where cables are not allowed to be installed
- You can use WI-FI all over the wolrd
- Can add devices quickly and easily
- Disadvantage
- Using WI-FI drains a lot of power on the device
- May be health problems
- Home network have a limited range (150ft)
- Can get interference from other radio signals
- Further you are away from the router theslower the speed
- Data is not as secure when sent via radio signals as opposed to cables
- Advantage
- Factors when choosing a network
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