CWNA Technology & Digital Applications 5

Question 1

A CWNA candidate evaluates a mesh WLAN backhaul link. Which metric MOST directly indicates whether the backhaul can sustain client traffic demands?

Accepted Answer

Throughput and latency of the wireless backhaul link

Answer

Beacon interval of the mesh AP

Answer

Number of SSIDs broadcast by the mesh root AP

Answer

DTIM period configured on the controller

Question 2

Which regulatory body in the United States governs the unlicensed use of the 2.4 GHz, 5 GHz, and 6 GHz bands for Wi-Fi operation?

Accepted Answer

FCC (Federal Communications Commission)

Answer

IEEE (Institute of Electrical and Electronics Engineers)

Answer

Wi-Fi Alliance

Answer

NIST (National Institute of Standards and Technology)

Question 3

What is the key difference between an Infrastructure BSS and an Independent BSS (IBSS) in 802.11?

Accepted Answer

Infrastructure BSS requires an AP as the central coordinator; IBSS is ad hoc with no AP

Answer

Infrastructure BSS uses 5 GHz while IBSS uses 2.4 GHz only

Answer

IBSS supports WPA3 while Infrastructure BSS only supports WPA2

Answer

Infrastructure BSS limits clients to 32 devices; IBSS has no limit

Question 4

Which antenna characteristic describes the pattern showing signal strength in all horizontal directions around a vertical antenna?

Accepted Answer

Azimuth plane (H-plane) pattern

Answer

Elevation plane (E-plane) pattern

Answer

Beamwidth angle

Answer

Front-to-back ratio

Question 5

In 802.11 WPA2-Enterprise deployments, which component authenticates user credentials and issues Access-Accept or Access-Reject responses?

Accepted Answer

RADIUS server (Authentication Server)

Answer

Wireless LAN Controller (WLC)

Answer

Authenticator AP (NAS)

Answer

Certificate Authority (CA)

Question 6

A site survey reveals a signal-to-noise ratio (SNR) of 10 dB at a client location. What is the most likely impact on wireless performance?

Accepted Answer

Marginal performance; only very low MCS rates achievable, frequent retries likely

Answer

Excellent performance supporting the highest MCS rates

Answer

Acceptable performance for all standard enterprise applications

Answer

No impact—SNR below 15 dB is ignored by 802.11 receivers

Question 7

Which 802.11 standard first defined the use of Multiple Input Multiple Output (MIMO) technology to improve throughput and reliability?

Accepted Answer

802.11n

Answer

802.11a

Answer

802.11g

Answer

802.11ac