CWNA Technology & Digital Applications 2

Question 1

Which Wi-Fi generation introduced OFDMA to improve multi-user efficiency in dense environments?

Accepted Answer

Wi-Fi 6 (802.11ax)

Answer

Wi-Fi 5 (802.11ac)

Answer

Wi-Fi 4 (802.11n)

Answer

Wi-Fi 6E (802.11ax-6GHz)

Question 2

A hospital deploys wireless systems for medical telemetry. Which frequency band is specifically reserved by the FCC for wireless medical telemetry?

Accepted Answer

608–614 MHz and 1395–1400 MHz WMTS bands

Answer

2.4 GHz ISM band

Answer

5 GHz UNII band

Answer

900 MHz ISM band

Question 3

What does the term 'BSS Coloring' in 802.11ax help accomplish?

Accepted Answer

Reduces co-channel interference by tagging frames from different BSSs

Answer

Assigns visual color codes to SSIDs for easy identification

Answer

Applies QoS color markings to differentiate traffic classes

Answer

Enables color-coded channel bonding across 2.4 GHz and 5 GHz

Question 4

In a Wi-Fi 6E deployment, which spectrum is made available that was not in Wi-Fi 6?

Accepted Answer

6 GHz band (5.925–7.125 GHz)

Answer

Lower 5 GHz UNII-1 channels

Answer

Extended 2.4 GHz channels above channel 13

Answer

60 GHz WiGig spectrum

Question 5

Which modulation scheme does 802.11ax support that 802.11ac does not, enabling higher throughput in favorable RF conditions?

Accepted Answer

1024-QAM

Answer

64-QAM

Answer

256-QAM

Answer

512-QAM

Question 6

What technology allows a wireless AP to serve both uplink and downlink MU-MIMO simultaneously in 802.11ax?

Accepted Answer

UL and DL MU-MIMO

Answer

TWT (Target Wake Time)

Answer

Trigger-Based Random Access (TBRA)

Answer

Spatial Stream Aggregation (SSA)

Question 7

A retailer wants to use Wi-Fi for real-time inventory tracking with battery-powered tags. Which 802.11ax feature would most extend tag battery life?

Accepted Answer

Target Wake Time (TWT)

Answer

OFDMA resource unit scheduling

Answer

BSS Coloring spatial reuse

Answer

Trigger-Based OFDMA uplink