You have installed a new 802.11ac WLAN configured with 80 MHz channels. Users in one area are complaining about poor performance. This area is currently served by a single AP. You take a spectrum analysis capture in the poor performing area. While examining the waterfall plot you notice the airtime utilization is higher on the first 20 MHz of the 80 MHz channel when compared to the rest of the channel. What do you conclude?

A. The AP is misconfigured and needs to be reconfigured to 80MHz operation

B. RRM is enabled and has dynamically picked a 20 MHz channel

C. The first 20 MHz is the AP's primary channel and higher airtime utilization on the primary channel is normal when an AP Is configured for 80 MHz operation

D. Non Wi-Fi interference is preventing the APs 80 MHz operation

What is the function of the PMD sub-layer?

A. Converts 1s and 0s given to it by the PLCP sub-layer into the appropriate RF signals

B. Provides framing

C. Adds a PHY preamble and header to a PSDU

D. Performs A-MPDU

Finish the statement. It is possible to distinguish between and 20 MHz transmissions when looking at an FFT plot.

A. HR/DSSS and ERP

B. ERP and VHT

C. HT and VHT

D. OFDM and HT

What is the function of the PHY Preamble?

A. To set the modulation method for the MPDU

B. Allows the receiver to detect and synchronize with the signal

C. To terminate a conversation between transmitter and receiver

D. Carries the NDP used in Transmit Beamforming and MU-MIMO

Which common feature of a Spectrum Analyzer would be the best to help you locate a non-802.11 interference source?

A. Max hold

B. Location filter

C. Waterfall plot

D. Device finder