CWDP CWDP QoS and Voice/Video over WLAN

Question 1

Which IEEE standard defines Quality of Service mechanisms for WLANs, including EDCA and TXOP?

Accepted Answer

IEEE 802.11e

Answer

IEEE 802.11r

Answer

IEEE 802.11k

Answer

IEEE 802.11v

Question 2

In WMM (Wi-Fi Multimedia), which access category has the highest priority?

Accepted Answer

Voice (AC_VO)

Answer

Best Effort (AC_BE)

Answer

Background (AC_BK)

Answer

Video (AC_VI)

Question 3

What is the primary purpose of TXOP (Transmission Opportunity) in 802.11e?

Accepted Answer

Allow a station to transmit multiple frames within a bounded time period

Answer

Increase the DIFS interval for high-priority traffic

Answer

Assign IP DSCP values to wireless frames

Answer

Enable multi-band simultaneous transmission

Question 4

What one-way latency budget is recommended for VoIP over WLAN to maintain acceptable call quality?

Accepted Answer

Less than 150 ms

Answer

Less than 50 ms

Answer

Less than 400 ms

Answer

Less than 1 second

Question 5

How does DSCP markings relate to WMM access categories in a Voice over WLAN deployment?

Accepted Answer

APs map DSCP values to WMM AC queues for traffic prioritization

Answer

DSCP values are ignored by wireless APs

Answer

WMM replaces DSCP in all enterprise deployments

Answer

DSCP is only used for wired uplink QoS

Question 6

Which metric most directly indicates the wireless medium is over-subscribed, degrading VoIP quality?

Accepted Answer

High channel utilization above 50%

Answer

Low noise floor below -90 dBm

Answer

High RSSI above -65 dBm

Answer

Wide channel bandwidth (80 MHz)