CWNA Technology & Digital Applications 4

Question 1

In a WLAN performing a site survey, what is the primary purpose of measuring the Received Signal Strength Indicator (RSSI)?

Accepted Answer

To gauge signal amplitude at a receiver to assess link quality and coverage

Answer

To determine the exact distance between AP and client using time-of-flight

Answer

To identify the data rate being used by a client device

Answer

To measure the noise floor of the channel

Question 2

A network engineer observes high co-channel interference on 2.4 GHz. Which action would most effectively reduce it?

Accepted Answer

Migrate clients and APs to the 5 GHz or 6 GHz band

Answer

Increase AP transmit power to override interfering signals

Answer

Switch from WPA3 to WPA2 to reduce overhead

Answer

Enable short guard interval on all APs

Question 3

What does the term 'channel bonding' refer to in 802.11n and later standards?

Accepted Answer

Combining two or more adjacent channels to create a wider channel for higher throughput

Answer

Binding a client to a specific AP channel permanently

Answer

Encrypting channel access with bonded authentication

Answer

Linking 2.4 GHz and 5 GHz into a single logical channel

Question 4

Which security protocol introduced Simultaneous Authentication of Equals (SAE) to replace the Pre-Shared Key handshake?

Accepted Answer

WPA3-Personal

Answer

WPA2-Personal

Answer

802.1X/EAP-TLS

Answer

OWE (Opportunistic Wireless Encryption)

Question 5

A wireless engineer is designing coverage for a warehouse with metal shelving. Which propagation phenomenon is most likely to cause dead zones behind shelves?

Accepted Answer

Absorption and reflection by metal causing RF shadowing

Answer

Refraction through metal surfaces

Answer

Doppler shift from moving inventory

Answer

Diffraction around conveyor belts

Question 6

In 802.11 CSMA/CA, what is the role of the Random Backoff Timer?

Accepted Answer

Forces a station to wait a random duration before retrying after a collision or busy channel

Answer

Schedules beacon transmissions at random intervals to prevent synchronization

Answer

Randomly selects the transmit channel to minimize interference

Answer

Randomizes WPA3 key generation for enhanced security

Question 7

Which EAP method uses a certificate on both the authentication server AND the client device, providing mutual authentication?

Accepted Answer

EAP-TLS

Answer

EAP-PEAP

Answer

EAP-TTLS

Answer

EAP-LEAP