Unit 2 Flashcards
(32 cards)
The categories of information
-business
-government
-individual
-education
-healthcare
-charity
-community
Categories of info- business
Holds info on all its employees e.g. DoB, address, financial info
Categories of info- government
Holds loads of info on all citizens in the country e.g. financial earnings, tax paid, births and deaths
Categories of info- individual
Holds info about themselves e.g. name, DoB, address, usernames & passwords
Categories of info- education
Schools, colleges and uni’s hold info about current and past students and staff. E.g. addresses, attendance records, exam history & contact info for parents
Categories of info- healthcare
NHS holds entire medical histories for each civilian in the country e.g. personal info, current address, DoB, blood type
Categories of info- charity
Holds financial info of donors who give money and info about the projects that donators are funding
Categories of info- community
Community organisations like sport centres may hold info on members, matches, meetings or events
Holders of info- comparison of locations
The location of systems and data affects access speed and network quality
Holders of info- digital divide
The gap between people who do and don’t have easy access to computers and networks
Storage media- magnetic storage
- HDD is the most common on desktops. A read/write head sits close to the disk and uses the magnetic field to read or edit data. Can also be external (USB)
- Floppy disk was replaced with SSD’s which are faster and have a higher capacity
- Magnetic tape has high storage capacity but data has to be accessed in order (so usually used to back up or w large amounts of data)
Magnetic storage characteristics
Large capacity
Cheaper per GB than SSD
Quick access speed
Not durable
Not portable when powered on
Storage media- solid state storage
- SSD has no moving parts. Are quieter, faster and use less power than a HDD. Can also be external
- USB flash drive/stick is used to transport files easily- due to small size
- Memory cards (SD/ Micro SD) e.g. a digital camera or smartphone.
Solid State storage characteristics
High capacity
Durable
Portable
Fastest access speed- cuz no moving parts
More expensive per GB than magnetic
Cheap ones break
Storage media- optical storage
CD, DVD, Blu-Ray.
Uses a laser to project beams of light onto a spinning disk, allowing it to read data.
It is the slowest option
Disc drives are internal but can be external for laptops
Optical storage characteristics
Thin
Portable
Low capacity
Not durable
Slowest access speed
Storage media- paper storage
Printer or hand written documents, notes, forms, maps. Producing it is environmentally damaging and needs physical security methods to keep safe. It is written on and easily carried. Paper in a printer would need to be reprinted to be edited
Paper storage characteristics
Inexpensive
Portable in small amounts
Low capacity
Poor durability
Slow access speed
Handheld devices
E.g. smartphone, e-reader, small tablet, smartwatch
They are small, light, portable but cannot have a powerful processor or high capacity
Handheld devices advantages
Light
Portable
Runs on battery power (no need for power source)
Handheld devices disadvantages
Low processing power
No cooling system
Relies on battery power
Likely to be lost, damaged or stolen
Small memory/storage capacity
Low versatility
Portable devices
E.g. laptop, large tablet
Larger and more powerful than handheld devices and can be carried easily
Portable devices advantages
Light
Portable
Runs on battery power- don’t need power outlet
More power & versatile than handheld
Portable devices disadvantages
Lower processing power
Smaller memory/storage capacity
Reliant on battery power
