IT Essential Ch. 1-4, 7 Flashcards
(122 cards)
The size, shape and physical layout of computer components such as case, motherboard, and power supplies
Form Factor
The measure of the work that is required to move a charge from one location to another
Volts
The measure of resistance to the flow of current in a circuit
OHMS (Ω)
The measure of the number of electrons moving through a circuit per second
Apms
The measure of the work per second of electrical current
Watts
The brain of the computer
CPU
The main temporary working storage location for data and programs
RAM
Memory location that stores basic operational instructions used by the CPU for booting the computer
ROM
A redundant array of disk drives that provides redundancy and fault tolerance
RAID
Storage devices that are replacing magnetic disk drives for permanent data storage
Solid State Drives (SSD)
Magnetic disk drives that are used for permanent data storage
Hard disk drive (HDD)
Computers that rely on a central server for all, or most, data storage and processing resources
Thin Client
The main circuit board inside the computer to which all computer components connect
Motherboard
Integrated circuits on the motherboard that control system hardware interaction with the CPU and motherboard
Chipset
Stands for electrostatic discharge, a sudden discharge of built-up static electricity between two different surfaces with different charge levels
Electrostatic Discharge (ESD)
Stands for electromagnetic interference, a disturbance affecting transmission media that use electrical signals. The disturbance is caused by electromagnetic field variations
Electromagnetic Interference (EMI)
A situation where voltage drops below 80 percent of the normal voltage over a period of time
Brownout
A significant increase in voltage above the normal voltage of a power line over a short period of time
Power Surge
Stands for uninterruptible power supply, a supplemental power resource that helps maintain the power requirements by providing a secondary, consistent level of electrical power to a device
Uninterruptible Power Supply (UPS)
Stands for material safety and data sheet, a fact sheet to provide information about material identification, fire hazards, and first-aid requirements. It also provides protective measures for the safe handling and storage of materials and spill, leak, and disposal procedures.
MSDS
A two-part tool that is typically used to identify an individual wire in a circuit. The toner part is connected to a cable at one end and generates a tone that travels inside the cable. The probe part traces the cable. When the probe is in close to the cable to which the toner is attached, the tone can be heard in the probe.
Tone Generator and Probe
A detailed list of problems and repairs that is maintained by a technician or by a support desk system. The list should include the date, problems identified, actions to correct the problems, replacement parts, and customer information. The records would allow a technician to determine what work has been performed in the past on a specific computer.
History of Repairs
A conductor that connects the wrist of a technician to the device that the technician is working on. When static electricity (ESD) builds up in the body, the connection made by the wrist strap to the device balances the electrical charge by channeling the electricity through the wire that connects the strap.
Anti-static Wrist Strap
A mat that is slightly conductive so as to help eliminate static electricity (ESD). It does this by drawing static electricity away from a component and transferring it safely from equipment to a grounding point.
Anti-static Mat
