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Midterm Review for Introduction to Wireless Communication Networking | IT 455, Exams of Information Technology

Material Type: Exam; Class: Intro Wireless Comm/Networking; Subject: Information Technology; University: George Mason University; Term: Fall 2014;

Typology: Exams

2013/2014

Uploaded on 10/16/2014

drputla3
drputla3 🇺🇸

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MidTerm Review
Stallings Chapters 1 – 6
CCNA Wireless Certification guide Chapters 1,3,4
Review all assignments
RF Fundamentals
RF spectrum used in wireless networks:
Microwave frequency range
1 GHz to 40 GHz
Directional beams possible
Suitable for point-to-point transmission
Used for satellite communications
Radio frequency range
30 MHz to 1 GHz
Suitable for omnidirectional applications
Infrared frequency range
Roughly, 3x1011 to 2x1014 Hz
Useful in local point-to-point multipoint applications within confined areas
Bandwidth, Channel Capacity (Shannon, Nyquist)
Bandwidth- - the bandwidth of the transmitted signal as constrained by the transmitter and the nature
of the transmission medium (Hertz)
Channel capacity- the maximum rate at which data can be transmitted over a given communication
path, or channel, under given conditions
Degradation of the wireless signal
Free space loss
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MidTerm Review Stallings Chapters 1 – 6 CCNA Wireless Certification guide Chapters 1,3, Review all assignments RF Fundamentals RF spectrum used in wireless networks:  Microwave frequency range  1 GHz to 40 GHz  Directional beams possible  Suitable for point-to-point transmission  Used for satellite communications  Radio frequency range  30 MHz to 1 GHz  Suitable for omnidirectional applications  Infrared frequency range  Roughly, 3x10^11 to 2x10^14 Hz  Useful in local point-to-point multipoint applications within confined areas Bandwidth, Channel Capacity (Shannon, Nyquist) Bandwidth- - the bandwidth of the transmitted signal as constrained by the transmitter and the nature of the transmission medium (Hertz) Channel capacity- the maximum rate at which data can be transmitted over a given communication path, or channel, under given conditions Degradation of the wireless signal Free space loss

Absorption Reflection, Refraction, Diffraction, scattering Multipath fading Fast, Slow, Flat, Selective fading Types of noise, SNR Units: Watts (1 W= 1J/s or 1Volt * 1Amp) Relative measurements (dB, dBm , dBi ) (know how decibel is defined for power ratio and voltage ratio) Antenna principles Antenna Types (Hertz, Marconi, Parabolic reflective) Antenna gain, EIRP (Effective Isotropic Radiated Power) Radiation pattern Propagation modes Ground Wave, Sky Wave, LOS (how they relate to RF frequencies), Fresnel zone Antenna Polarization (vertical, horizontal, circular) Antenna diversity (space, frequency) Signal encoding techniques (AM,FM,PM, ASK,PSK,FSK – know the difference between AM and ASK etc) Apply the knowledge to US AM and FM radio broadcast (Review Class workshop, composite waveform characteristics, Carson rule) PCM ,Delta Modulation What is quantizing and dynamic range, companding