Chapter 1 Review Questions

How is the amplitude of an RF signal defined?

• The length of the wave

• The relation of the wave to another wave

• The strength of the signal

• The reflectivity of the signal

What is increased as the frequency of a wave decreases?

• Wavelength

• Phase

• Modulation

• Diffraction

What RF behavior occurs when a wave encounters an object that causes much or all of the signal to be redirected?

• Absorption

• Attenuation

• Reflection

• Phase

What kind of modulation is used in WLANs?

• FSK

• ASK

• Analog

• Audible

What is the name of the scheme that determines data rates in WLANs?

• Modulation and Coding Scheme

• Reflection and Attenuation Scheme

• Moore’s Law

• Modulation and Phase Scheme

What happens when RF energy is converted to heat when passing through some materials?

• Absorption

• Reflection

• Phase shifting

• Frequency shifting

What RF behavior is most likely to result in the creation of RF shadow?

• Reflection

• Diffraction

• Scattering

• Absorption

In addition to the modulation and coding, what other two primary factors impact the data rate achievable in a WLAN link?

• Frequency and phase

• Channel width and number of spatial streams

• Channel width and frequency band

• Frequency band and spatial streams

What is a comparative attribute of an RF wave as it relates to another wave in the same channel?

• Wavelength

• Frequency

• Amplitude

• Phase

What metric is preferred by engineers and is used to represent received signal strength?

• RSSI

• dB

• dBm

• Frequency