ICT Unit 1: Lessons 1 and 2 Flashcards
Computing power per square inch of circuit board will double every year
Moore’s Law
IPOS or the Computing Cycle
Input Processing Output Storage
Brain of the computer, Does all the Processing, and is Speed measured in hertz (Hz)
Central Processing Unit (CPU)
Memory chips that are stored on your computer’s motherboard
Stores data being processed by the CPU also Short Term Memory where data is stored as the processor needs it
Random Access Memory (RAM)
Circuit board inside computer
Connects all devices
Power supply: Responsible for powering the computer and its parts
Motherboard
Power Supply Unit
PSU also it Powers the Motherboard
Stores all the software and data that is not being used currently by the CPU
Known as permanent storage because unlike RAM the hard drive retains all the data stored even when the computer is turned off
Like RAM, hard drive space is measured in bytes
Less expensive than RAM, but slower also is the main storage device of the computer
all of a computer’s system files and folders are stored on it
Hard Drive
Plugged directly into the motherboard’s expansion slots Accessible from the rear of the system unit Add functionality (video, network, graphics)
Expansion cards
Keyboards, Mouses, Digital Cameras, Scanners, Microphones, Game Controllers, Stylus, Barcode Readers, Fingerprint Scanners, and GPS Devices
Input Devices
Monitors, Projectors, Printers, Speakers
Output devices
A small, portable storage device that connects to a computer USB
Enables user to conveniently store and carry files
Flash Drive or USB Device
A small, portable storage device that is inserted into small input/output devices
Commonly used by digital cameras and camcorders
Flash Memory Card or SD Card
Flat, round portable storage devices that require specialized optical drives to read and save (write) data
CD or DVD
Was commonly used with a mouse
Has been widely replaced by USB
Rarely used today
Serial DB-9 connector
Connects to a 9-pin serial port
Was used to connect printers
Has been widely replaced by USB
Rarely used today
Parallel DB-25 connector
Connects to a 25-pin parallel port
USB (Answer is the acronym)
Universal Serial Bus
Widely used standard connector and port
Keyboards, mouse pointers, printers, phones and cameras all use USB technology
Can connect up to 127 devices to the computer
Replaced both DB-9 and DB-25 because of its speed and standardization
USB
Can transfer data at speeds comparable to USB
Commonly found on specialized camcorders
Supports a maximum of 63 devices
IEEE 1394
Also known as FireWire
Used solely for video
Most monitors and projectors come equipped it
VGA(Video Graphics Array) interface
DB-15 connector
An additional interface used solely for video
Supports high-quality video signals compared to VGA
Most monitors come equipped also came with this
DVI (Digital Visual Interface)
HDMI (Answer is acronym)
(High-Definition Multimedia Interface)
An audio/visual interface for transferring high-quality video and audio signals
Most modern monitors, projectors and televisions come equipped with this
HDMI
A small modular connector used by modems
Commonly seen at the end of a home telephone line(landline)
RJ-11 connector and port
A larger modular connector used for connecting to networks
Commonly referred to as an Ethernet connector or Ethernet port
RJ-45 connector and port (Ethernet)
