Certified Wireless Network Administrator (CWNA): PW0-105

What word describes the bending of an RF signal as it passes from one medium to another medium of a different density?

A. Diffraction

B. Reflection

C. Refraction

D. Diffusion

E. Scattering

What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) in IEEE

802.11 WLANs?

A. 802.11a and 11n use six (6) "pilot" subcarriers as a reference for the receiver to detect frequency and phase shifts of the signal.

B. 802.11a/g/n OFDM includes several combinations of modulation and coding to achieve data rates from 1-600 Mbps.

C. With 802.11a OFDM, 16-QAM provides either 48 or 54 Mbps data rates, depending upon coding rates.

D. 802.11n HT-OFDM utilizes 256-QAM, which increases the data rate from 54 Mbps (with 64-QAM) up to 65 Mbps.

E. In 802.11a OFDM, forty-eight (48) subcarriers are used as parallel symbol transmission paths to carry data.

What advantages does using predictive site survey modeling software offer over performing a manual site survey? (Choose two)

A. Predictive modeling software can predict the ideal access point location 100% of the time, whereas the results from manual surveying are less reliable.

B. Predictive modeling software makes it simple to assess multiple different AP locations and then adjust and display the AP's expected coverage pattern in almost real-time.

C. Predictive modeling software provides more reliable data than manual surveys when fine-tuning and validating access point placement after the installation.

D. The exact impact of interference sources from external networks can be more accurately measured when using predictive modeling software than with manual surveys.

E. It takes less time to create an initial site survey for a large facility when using predictive modeling software than when performing a manual survey.