CompTIA A+ Terminology

CompTIA A+ Terminology - Safety, Basic Hardware

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Side ASide B
Electrostatic Discharge.  Passage of static electrical charge from one item to another.  Avoid by keeping you and the parts of the PC at the same electrical potential. Most...
Electromagnetic Interference.  Magnetic field interfering with  electronics.  Can cause permanent damage to some components and erase data on some storage devices. ...
Radio Frequency Interference.  Most devices are shielded to prevent RFI.  A few devices, particularly speakers, are most susceptible. These devices can be tuned to avoid the...
Connectors, Plugs, Ports, Jacks
Connector- port, plug, jackPort- plug does into itJack- alternative to port, plug goes into it
Mini-Din Connectors

Also called PS/2 and DIN-6. Most commonly used for keyboards and mice. Modern systems have replaced mini-DIN connections with USB.
USB Connectors
Used with mice, keyboards, scanners, cameras, and printers. Come in three sizes: A (on computer), B (are for other end of the USB connector), and mini-B (used for small devices such...
FireWire Connectors

Also known as IEEE 1394. 6-wire or 9-wire connector.  Moves data at incredibly fast speeds.  Are hot-swappable.
DB Connectors

Known as D-sub or D-subminiature or D-shell connectors. Used for almost every peripheral with exception of keyboards. Slight D-shape. Can have from 9 to 37 pins, although rarely more...
RJ Connectors

RJ 11 used to connect phone jack for modems to connect PC to a network.  RJ-45 jack is used for network connections. Note that modern PCs have built in network connections; however...
Audio connectors and Sound
Speakers and monitors connect to audio jacks.  Most common kind is 1/8-inch connector, also called mini-audio connector. Most computers have two miniature audio jacks: one for...
Connector used for keyboards
Mini-DIN or USB. Port colored purple.
Connector used for monitors
Connects to video connector, with old 15-pin female DB Video Graphics Array (VGA) or unique digital visual interface (DVI). VGA are blue; DVI are white.  New connector is High-Definition...
Connector used for mouse
Uses either USB or a light-green mini-DIN connector.
Connector used for printer
Old: parallel port (25-pin female DB) that's usually colored fuchsia; most printers now come with USB, Ethernet, and Wi-Fi  802.11 b/g/n connectivity options.

Some external hard drives and optical dives can connect via eSATA.
Central processing unit. Also called microprocessor. Performs all calculations in PC. Require cooling fans (blows heat out) and heat sinks (draws heat away). Two most common: AMD and...
Random access memory. Stores programs and data currently being used by the CPU. Average PC will have from 1 to 4 GB of RAM. Each piece of RAM is called a stick. Common stick in PCs...
Everything connects to motherboard, either directly or indirectly.
Hard drive

Stores programs and data that are not currently being used by the CPU.  Most PCs have storage capacity of hundreds of gigabytes to terabytes. Two most common: Parallel Advanced...
Optical drive
Use same PATA or SATA connections used with hard drive. CDs store around 700 MB come in three varieties: CD-ROM (read only memory), CD-R (recordable, you can change data once), and...
Hardware, Software
Hardware- physical computer equipment, such as electrical, electronic, magnetic, and mechanical devices.Software- applications and OS's

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