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riniai
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What is information technology?
It is the design, development, implementation, support, and management of computer hardware and software applications.
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Who developed the A+ Certification program?
Computing Technology Industry Association (CompTIA)
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What does the A+ Essentials exam measure?
The A+ Essentials exam measures the necessary competencies of an entry level IT professional with at least 500 hours of hands on experience in the lab or field. This includes the fundamentals of computer technology, networking, and security, as well as communications skills.
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What are the five modules of the EUCIP IT Administrator Certificate?
- 1. PC Hardware; the basic maeup of a personal computer and the functions of its components; dignose and repair
- 2. Operating systems; installing/updating system and apps
- 3. LAN and network services
- 4. Expert network use
- 5. IT security
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What makes up a computer system?
hardward and software
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What is hardware?
physical equipment
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What are examples of hardware?
keyboard, monitor, cables, speakers, mouse
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What is software?
operating system and programs
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What does A+ Certification signify?
It signifies that a candidate is a qualified PC hardware and software technician.
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What does the operating system do?
It instructios the computer how to operate (identifying, accessing, proccessing)
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What does the computer case do?
It protects the internal components
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What determines the size and shape of the computer case?
The motherboard and other internal components.
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How large should the computer case be?
Depends; in general, it should be durable, easy to service, and have enough room for expansion.
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How large should the power supply be?
large enought to supply power to its current components; future upgrades to current components may also require a larger power supply
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What does a computer case contain?
The internal components of a computer
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What are computer cases made of?
plastic, steel, aluminum
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What are the size and layout of a case called?
form factor
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What are the basic form factors for computer cases?
desktop and tower
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What must be considered when choosing a case?
- -size of the motherboard
- -nuber of internal/externals drives (bays)
- -available space
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How are internal components grounded?
attachment to the case
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What does a power supply do?
converts AC power to DC, which is a lower voltage
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What can protect a computer from problems caused by a change in power?
UPS (uninterttuptible power supply)
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What does a power invertor do?
provides AC power from battery by converting DC current of UPS battery
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What is a keyed connector?
It is designed to be inserted in only one direction.
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What is a molex connector used to connect?
Optical drive or hard drive
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What does a berg connector connect?
floppy drive
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What kind of connection is used to connect the motherboard?
- 20-pin or 24-pin slotted connector
- 20=2x10
- 24=2x12
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What is the voltage of the yellow wire?
+12V
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What is the voltage of the blue wire?
-12V
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What is the voltage of the orange wire?
+3.3V
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What is the voltage of the red wire?
+5V
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What is the voltage of the white wire?
-5V
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What color is the ground wire?
black
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What are the four basic units of electricity?
- V - voltage
- I - current
- P - power
- R - resistance
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What is voltage?
measure of force required to push electrons through a circuit
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What is current?
amount of electrons going through a circuit
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How is current measured?
amperes, amps (A)
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What is power?
voltage*current
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What is the measurement of power?
watts (W)
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What is resistance?
opposistion to flow of current
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How is resistance measured?
ohms
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Lower resistance allows _______ current
more
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What will result in higher power?
increasing the current or the voltage
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What is the motherboard?
the main printed circuit board that contains buses (electrical pathways)
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What is a bus?
electrical pathways
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What are other names for the motherboard?
system board, backplane, main board
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What items are on the motherboard?
CPU, RAM, expansion slots, heat sink/fan, BIOS chip, chipset, wires
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What does form factor refer to?
the size and shape of the board
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What does the form factor determine?
how individual components connect to the motherboard and the same size and shape of the computer case
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What is the most common form factor in desktop computers?
AT, based on the IBM AT motherboard
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What is the newer motherboard form factor?
ATX - improvedAT design
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What is the chipset?
various integrated circuits attached to motherboard that control how system hoardware intereacts with CPU and motherboard
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What deptermines the type of CPU that can be installed?
the slot/socket in which the CPU is installed
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What are the two components that make up the chipset?
Northbridge and southbridge
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Which component controls access to the RAM, video card, and the speeds at which the CPU can communicate with them?
Northbridge
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Which component allows the CPU to communicate with the hard drives, sound card, USP ports and other I/O ports?
southbridge
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What is the brain of the computer?
CPU
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Whare are the most common CPU manufacturers?
Intel, AMD
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What is the connector that interfaces between the motherboard and the processor?
CPU socket/slot
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What is PGA?
pin grid array
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What is ZIF?
zero insertion force
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What does ZIF refer to?
the mount of force needed to install a CPU
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What is PGA architecture?
the area in which the underside of the processor are inserted
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What is a program?
sequence of stored instructions
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