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84 Cards in this Set
- Front
- Back
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AC |
Alternating Current - Current that changes in value and periodically reverses in it's direction |
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Wave forms |
Graphics representation kf how voltage and current changes in amplitude over a period of time. |
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Sine wave |
The most common type of AC waveform. Continuously changing in amplitude and periodically reversing direction. |
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Cycle |
The complete representation of the some wave throughout 360 degrees is called a cycle. |
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Peak voltage |
The absolute value from zero volt axis to the peak of either alternation. (90 degrees for positive, 270 degrees for negative peak) |
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Peak to peak voltage |
The absolute value from the negative peak to peak to the positive peak. |
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Frequency |
The number of 360 degree sine wave cycles per second. |
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The symbol for frequency |
f |
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The units of measure for frequency |
Hertz |
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Symbol for hertz |
Hz |
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Frequency formula |
F = 1/t |
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Conductor |
Materials such as gold, silver, copper, aluminum. Facilitate current flow |
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Insulator |
MateriaLs such as plastic, rubber, glass, and porcelain. Inhibits current flow. |
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Direct current |
Current which flows in one direction |
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Current flows from the _________ side of the battery |
Negative |
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The symboL for current is... |
I |
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Current is measured in.... |
Amperes |
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The symbol for amps is... |
Ampere |
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Circuit |
Conductors connected together for the purpose of carrying an electrical current |
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Three requirements for current flow: |
Voltage, conductor, and continuity |
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Voltage source |
Battery or AC generator |
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Conductor |
Any material that facilitates current flow |
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Continuity |
A compLete unbroken path between negative voltage source and the positive voltage source. |
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Voltage |
The electrical energy causing electrons to move from atom to another. Difference in potential from one side of an electrical component to another. |
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Symbol for voltage |
E |
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Resistance |
The opposition to current flow. |
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Symbol for resistance |
R |
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Resistance is measured in... |
Ohms |
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Power |
The ability to do work over time |
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Symbol for power |
P |
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Power's unit of measure is |
Watt |
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The symbol for watt is |
W |
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Electrostatic discharge |
The transfer of charge between bodies of different electrical potentials |
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__________ __________ can change the electrical characteristics of a semiconductor device, regarding or destroying it. |
Electrostatic discharge |
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ESDS |
ESD sensitive |
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ESDS items will be marked as... |
MIL-STD-1285 symboL on the exterior surface |
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Static electricity |
An electrical charge on the surface of a material. |
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__________ surfaces can attract and hold contaminants. These contaminants can cause __________ defects and reduce product quality. |
Charged, random |
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The best way to prevent ESD is to.... |
Keep humidity high. |
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Electrostatic charge |
Created by friction between two different materials. |
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What two rules will substantially reduce the risk of ESS damage? |
1. Handle all ESDS items at an approved static control station. 2. Transport all ESDS items in static shield and non charge generating packages or containers. ESDS bags. |
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Voltage created in low humidity when walking across carpet |
35,000V |
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Voltage created in low humidity when walking across vinyl tile |
12,000V |
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Voltage created in low humidity when working at a bench |
6,000V |
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Voltage created in low humidity when picking up a poly bag from a bench |
20,000V |
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Voltage created in low humidity from a char with urethane foam |
18,000V |
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Current trends in product design and development pack more _________ onto the miniature devices, further increasing their _________ to ESD. |
Circuitry, sensitivity |
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Motherboard |
The main circuit board in a desktop computer and provided the interconnections for all necessary parts and associates peripherals. |
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Form factor |
Describes the shape, size, and and mounting characteristics of a motherboard |
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ATX |
Primary motherboard form factor |
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Micro atx |
A smaller version of ATX |
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BTX |
A motherboard that is optimized for air flow through a case as components run hotter and hotter |
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CPU |
The "brain" of a computer. It tells the system components what to do and when to do it. Interprets computer program instructions and processes data. |
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Two main manufacturers of CPUs |
Intel and AMD |
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Heatsink |
Component that transfers and dissipates heats. |
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________ _________ is added to the base of the heat sick to help with thermal conduction between the ________/__________ |
Thermal paste CPU and heatsink |
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Northbridge |
Control the interaction of the CPU with memory and video and is closer to the CPU to make access time quicker. |
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Southbridge |
Controls interactions between buses and devices. |
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Primary Storage |
Directly connected to the computers CPU and must be present for the CPU to function correctly |
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Processor register |
Internal to the CPU. Store information that the arithmetic and logic units need fk carry kit instructions. |
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Cache memory |
Special type of internal memory used by CPU to increase it's performance or throughput. |
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L1 |
Faster but smaller than main memory |
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Main memory |
Contains the program data currently being processed. |
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Secondary storage |
Used for long term storage of information |
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Two main reasons values are stored in ROM |
Permanence Security |
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Dynamic RAM |
Made up of a transistor and a capacitor paired to create a memory cell. The capacitor holds the bit of info, a 0 or 1. |
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Static RAM |
Uses a form of flip flop do hold data. Uses more parts so larger than dram bit faster |
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SIMM |
Single Inline module |
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DIMM |
Dual Inline Memory Module requires memory to be installed two at a time in paired slots. |
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SDRAM |
Synchronous DRAM - use a common system clock signal. |
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Laser printer stages |
Processing Conditioning Exposing Developing Transferring Fusing Cleaning |
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Tracks |
Contentric circles around the platter |
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Sector |
Smallest unit of storage in a disk, 512 kb |
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Seek time |
The amount of time required to move a drives read/write head to a particular location on disk. |
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Access time |
The amount of time from when data is requested from the drive until it is delivered |
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CD Drive has what three components? |
A drive motor, a laser, a tracking mechanism. |
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Sanitizing |
Removing classified and sensitive information from hard drives. |
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The information security officer prepares and submits a ________ and __________ a label and letter according to examples in AF-MAN 33-282 |
Prepares and submits |
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Isso |
Information Systems Security Officer |
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Which forms of media can be sanitized by with overwriting three times? |
Sealed disks Removable disk packs Magnetic bubble packs Core memory Eeprom Flash memory |
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Degaussing |
A process where the magnetic hard drives are erased reducing the magnetic flux to zero by applying a reverse magnetizing field |
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What forms of media are sanitized by degaussing? |
Hard drives, magnetic tapes, floppy disks, diskettes, magnetic cards |
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What sanitization method is used for EPROM? |
Perform an ultraviolet light erase according to manufacturer recommendations. |
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Troubleshooting methodology |
- Identify the problem - Establish a theory - Test the theory - Establish a plan and implement solution - Verify system works and use preventative measures - Document findings, actions, and outcomes |
