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CNM324 Exam One Questions And Correct Answers

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CNM324 Exam One Questions And Correct Answers What is wrong with most RF (radio frequency) setups? - answerMost of the time RF propagation occurs in non ideal environments Wavelength - answerthe distance between identical points in the adjacent cycles of a waveform. In wireless systems, this length is usually specified in meters, centimeters, or millimeters Frequency - answerthe number of complete cycles per second in alternating current direction. The standard unit of frequency is the hertz, abbreviated Hz. Wavelength Formula - answerspeed of light (c)/frequency What is Tx? - answerTransmit power, amount of energy across a defined bandwidth. Either measured in dBm or W decibel (dB) - answera logarithmic unit of sound intensity 3 dB rule - answeradding 3dB doubles the power, subtracting 3dB halves the power Effective Isotropic Radiated Power (EIRP) - answermeasured in dBm = power at antenna input [dBm] + relative antenna gain [dBi] Effective Radiated Power (ERP) - answermeasured in dBm = power at antenna input [dBm] + relative antenna gain [dBd] Three types of propagation frequency bands - answerVery Low Frequency, High Frequency, and Medium Frequency Waves behave more like ____ at higher frequencies and ____ at lower frequencies - answerlight, radio Diffraction - answerRadio path between transmitter and receiver is obstructed by a

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©SIRJOEL EXAM SOLUTIONS
10/14/2024 11:14 PM



CNM 232 MIDTERM EXAM REVIEW
Questions And Correct Answers


ATA - answer✔An acronym for Advanced Technology Attachment; the disk drive standard
commonly known as Integrated Drive Electronics (IDE).

biometrics - answer✔the science and technology of authenticating a person's identity by
measuring physiological features

BIOS - answer✔An acronym for basic input/output system; the set of essential software routines
that test a PC at start up and start the OS

bus - answer✔the set of hardware lines used to transfer data among the components of a PC

cable modem - answer✔A device that sends and receives data through coaxial cables.

CRT - answer✔An acronym for cathode ray tube; the basis for the standard PC display screen.

digital camera - answer✔A type of camera that stores photographic images electronically rather
than on film

digital video camera - answer✔a camera that captures and stores images on a digital
medium(also known as a camcorder)

EEPROM - answer✔An acronym for electrically erasable programmable read-only memory; a
type of EPROM that can be erased with an electrical signal.

electrostatic discharge (ESD) - answer✔The discharge of static electricity from an outside
source— such as human hands—into an integrated circuit, often damaging the circuit.

EPROM - answer✔An acronym for erasable programmable read-only memory; a type of
memory chip that can be reprogrammed after manufacture.

eSTATA - answer✔an external connector that provides fast data transfer for external SATA hard
drives

, ©SIRJOEL EXAM SOLUTIONS
10/14/2024 11:14 PM
expansion card - answer✔A circuit card that is plugged into a PC's bus to add extra functions.

fingerprint scanner - answer✔A scanner that reads human fingerprints for comparison to a
database of stored fingerprint images.

FireWire - answer✔a PC and digital video serial bus interface standard offering high speed
communications(FireWire is also known as IEEE 1394)

firmware - answer✔software routines stored in read-only memory(ROM)

flyback transformer - answer✔A transformer in a CRT monitor that generates up to 20,000 volts.

form factor - answer✔The physical size and shape of a device. The term is often used to describe
the size of PC cases.

guest operating system - answer✔the operating system running within a virtual machine

hard drive - answer✔a device that reads data from and writes data to one or more inflexible
platters

heat sink - answer✔A device that absorbs and dissipates heat created by an electronic device,
such as a microprocessor.

host operating system - answer✔An operating system running on a physical machine that
executes virtualization software.

IDE controller - answer✔a disk drive standard, known as Integrated Drive Electronics (also see
ATA)

LCD - answer✔an acronym for liquid crystal display; a type of display that uses a liquid
compound with a polar molecular structure sandwiched between two transparent electrodes

memory - answer✔an area where data can be stored and retrieved

microprocessor - answer✔a central processing unit (CPU) on a single chip

modem - answer✔short for modulator/demodulator; a communications device that enables a PC
to transmit data standard telephone line

mouse - answer✔a common pointing device

Network Interface Card (NIC) - answer✔an expansion card used to connect a computer to a local
area network

optical drive - answer✔a disk drive that reads and may write data to optical (compact) discs

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