CWNA-106 Certified Wireless Network Administrator Question and Answers

Alternates between awake and dozing, depending on its need to transmit and receive information

Enters a low-power radio state until it receives a WMM PS-Poll frame from the AP

Experiences higher throughput and lower latency than when operating in Active mode

Powers down a subset of MIMO radio chains and transmits information at a slower data rate

Buffers frames destined to the low-power AP until the AP wakes its radio and begins beaconing again

802.1p to WMM mappings

SNMPv3 Users

WMM-PS Dozing Interval

RADIUS Server IP Address

EAP Authentication Type

Channels 5 and 10

Channels 1 and 5

Channels 3 and 7

Channels 2 and 8

Channels 8 and 11

Channels 10 and 13

The access points are mounted too closely to one another.

Reflective objects in the area are causing significant multipath.

A client station is using active scanning to probe for access points on multiple channels.

The output power on the access points is too high.

A client station authenticates to both access points, but does not associate.

The access points are not synchronized to the same NTP server.

802.11ad compatibility

TPC support

Impedance in Ohms

Elevation Beamwidth

Return Loss Rating

Operating Frequencies

Client devices ignore the TIM field and automatically send PS-Poll frames after every beacon.

After each beacon, the AP attempts to empty its frame buffer by sending Wake-on-WLAN frames to wake each dozing client.

Request-to-Send and Clear-to-Send frame exchanges are used to trigger the delivery of buffered data.

The Beacon interval is changed from the default 100 time units to 10 or less time units.

Clients send null data frames to the AP and switch the power management bit from 1 to 0 to receive queued data.

Stations send a CTS-to-self frame to the AP with a very long duration period so they can receive all of their buffered data at once.

Theft prevention and data security of WLAN infrastructure devices

Wireless intrusion monitoring and response procedures

WLAN performance analysis baseline documentation

Wired network performance analysis and baseline documentation

Training of the IT staff on WLAN operational security

User density planning and AP client association thresholds

Introduces “fast transition” roaming protocols for VoWiFi phones

Better link reliability between 802.11a/b/g client devices and 802.11ac APs

Improves service quality for real-time applications at greater distances

Increases in receive sensitivity enhance RTLS location accuracy

Stronger security with more robust encryption modes.

Short guard intervals

DTIM Interval

Listen Interval

Probe Request frames

RTS or CTS frames

A heat map demonstrating signal quality in areas where VoWiFi is supported.

Codec types and sampling rates for each VoWiFi phone

Security parameters and configuration steps for VoWiFi handsets.

Test results from an active survey with a VoWiFi handset

Results of OFDM versus ERP performance in each BSA

A single AP supports multiple BSSs with different SSIDs

A virtual cell single channel network has been implemented

The beacons are from an IBSS instead of a BSS

Three APs still share the same default configuration.

Real-time retry monitor

AP Signal strength meter

Spectrum analyzer utility

VLAN configuration

Link statistics display

802.11 QoS is achieved by giving high priority queues a statistical advantage at winning contention.

Four 802.1p user priorities are mapped to eight 802.11 transmit queues.

When the Voice queue has frames awaiting transmission, no data will be transmitted from the Best Effort queue.

To improve efficiency, Block Acknowledgments are required for Voice and Video WMM queues.

802.11 control frames are assigned to the 802.11 EF priority queue.

All ports on the Ethernet switch will be supporting Class 3 PoE powered devices.

Some APs are connected to a PoE switch and are also receiving power from an AC outlet.

The Ethernet switch uplink ports are not connected to an 802.3-2012, Clause 33-compliant core or distribution Ethernet switch.

A gigabit Ethernet switch port supporting an 802.11a/g AP auto-negotiates to 100 Mbps.

The installation team is not informed that PoE support will reduce the recommended maximum UTP cabling length from 100m to 50m.

The number of client stations associated to the BSS

The power management settings in the access point’s beacons

The presence of co-located (10m away) access points on non-overlapping channels

The data rates at which nearby client stations are transmitting and receiving data

The layer 3 protocol used by each station to transmit data over the wireless link