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| Questão | Responda |
| standard computer system | Input -> CPU -> Output | \/ Storage |
| DPA (Data Protection Act) | -Personal data-> kept secure -Personal data-> kept accurate -Personal data-> specific purpose |
| Health and saftey at work act | -Safe working environment -RSI-> Keyboards -Posture-> Chairs |
| copyright, design and patents act | -Illegal to use software/other media without buying it -Purchasing of licenses |
| Importance of computer standards | computers are embedded within many everyday task TRAVEL - traffic lights/sat navs/flight control systems DEVICES - mobile phones/cookers/microwaves NO COMPUTERS => Minor inconveinience (cannot boil kettle) Major saftey issues (traffic lights stop working) |
| reliability | how reliable is a computer system?? measured by how often it is avaliable - 99% Mean Time Before Failure (MTBF) If reiability is essential (hospital patient monitoring systems) then HARDWARE REDUNDANCY is used to protect systems |
| Hardware Redundancy | Have more than one critical component so they can be swapped |
| Data Loss | Two copies of data stored so data can be resored if necessary - (previous versions at EMC) |
| Disaster Recovery Plan | Companies using computers should have a DISASTER RECOVERY PLAN - fire/flood/theft .... An effective plan should enable them to get system back online without delay |
| Standards | Computer systems = complex.... if every company did it their own way they wpuls be even more complex/internet wouldn't work etc |
| De Facto | People/organisations work certain ways and over time this way of working becomes standard - using INDENTS when coding/adding comments to programme code |
| De Jure | (LAW) Wireless signals - must be adhered to otherwise different devices will not be to connect |
| Proprietary | (owned by organisation) ensure compatability within campanies products |
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