Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
CTECH IT unit 1
for my dear
| Question | Answer |
|---|---|
| Input device | Type of device that allows data, such as text, images, video or sound, to be entered into a computer system. |
| Output device | Type of device that shows something created by a computer (e.g. documents, on-screen data and sound). |
| Biometric device | A type of device that can authenticate somebody. Used when security is paramount (e.g. government or laboratories). User needs to have inputted their data prior to using it for the first time. |
| Control unit | Component of a processor that directs and co-ordinates most of the operations in the computer. |
| ALU | Component of a processor that processes and manipulates data. It performs simple calculations and comparisons on data that is temporarily stored in the registers. |
| Register | Component of a processor that acts as a storage location, where data or control information is stored. Usually much faster to access than internal memory, since they have to be accessed so often. |
| Cache memory | Volatile storage that is fast access temporary storage location that stores frequently accessed data of the CPU. Data is moved from the registers to here when it is not being actively used. |
| Primary storage | Type of storage that can be directly accessed by the CPU, so access speeds are quick. |
| Volatile | Data is lost whenever the power is turned off: it is temporary. |
| Non-volatile | Retains the data when not being powered, so it can be accessed when the computer is next on and can be stored long-term. |
| RAM | Volatile storage used to temporarily store currently running programs. It is made up of a large number of storage locations, each identifiable by a unique address. |
| ROM | Non-volatile storage that cannot be changed. Used to store the start-up instructions and BIOS. These instructions cannot accidentally be changed, otherwise the computer won't start up properly, which is why it needs to be here. |
| Secondary storage [abbreviated to SS in some definitions] | Non-volatile storage used to hold data that can be accessed repeatedly. Usually further away from the CPU (and often external), so it takes longer to access than the other one. |
| Magnetic storage | A write-head write data and a read-head accesses data Large storage Durability: moving parts=fragile moving parts = not v portable V Quick access Suitable for: Store lot of info, back up data ]- cause of high capacity hardD, FloppyD, MagnetTape |
| Optical storage | Storage device that records data by burning microscopic holes in the surface if the disk with a laser. Disks v fragile, break / scratch V portable cos thin Slow access speed used: Storing multimedia files such as music, pictures and videos. |
| Solid state storage | SS device uses electronic circuits to read and store data. called FLASH MEMORY Large Capacity Durable ]- no move parts -makes faster + less likely to dmg Portable -small pretty quick access |
| Cloud storage | Data on servers, can be accessed from any PC with internet Capacity: up to 1TB Reliable speed of access dependent on internet access Storing data files that multiple workers need access to. Storing files for people to edit simultaneously. |
| Motherboard | The main circuit board of a computer. CPU and ROM are directly attached. Has expansion slots for cards that have a specific purpose. |
| GPU (Graphics Processing Unit) | A processor on a video card used to create graphics. It takes the load off the CPU. Integrated ones are cheaper and generate less power + heat, meaning they're good for laptops. Dedicated ones are more expensive and generate more heat (needing a fan |
| Sound card | Converts analogue sound waves to digital data and vice versa. They can also be integrated onto the motherboard or as an additional card. |
| Network Interface Card (NIC) | Allows computers to connect to networks and transfer data to other computers. It is the hardware connection between the computer and a network cable. |
| Wireless network card | Enables computers and other devices to receive and send wireless communication (such as Wi-Fi). |
| Storage controller card | Is the interface between the motherboard and any connected storage devices. It is required for the computer to manage and use attached devices. |
| Fibre channel card | An expansion card used to transfer data between servers across a network. Is a high-speed network technology that allows for quick transfer speeds and is primarily used to connect data storage to servers in large data centres. |
| Power Supply Unit (PSU) | Receives alternating-current electricity from the mains and converts it into direct-current, that the computer can use. All units need a cooling system, usually a fan but others may use water coolant systems. |
| USB | Enables the computer to connect with standalone devices such as printers, cameras, broadband modems and mobile devices. |
| Ethernet | A network port used to connect computers to modems, routers or local area networks. |
Created by:
sunnysprinkl3s
Popular Computers sets