CWNA-106 Online Practice Questions and Answers

What threecipher suites are specified by the IEEE 802.11-2012 standard? (Choose 3)

A. Counter Modewith CBC-MAC Protocol

B. Wi-Fi Protected Access v1 and v2

C. Internet Protocol Security

D. Extensible Authentication Protocol

E. GCM with Galois Message AuthenticationCode (GMAC) Protocol

F. Wired Equivalent Privacy

G. Temporal Key Integrity Protocol

When using an RF splitter to connect one transceiver to sector antennas loss is incurred. What is this loss called?

A. Conversion loss

B. Through loss

C. Active loss

D. Intentional loss

As a consultant, you've been hired by XYZ Company to provide recommendations about client device selection, operation, and interoperability. What information should be considered to help them choose the right WLAN client devices?

A. 802.11n OFDM is more susceptible to high-power, narrowband interference than 802.11a OFDM

B. In order toearn Wi-Fi Alliance certification, 802.11n clients stations are required to support both 2.4 and 5 GHz frequencies

C. 802.11ac devices support the features of the VHT PHY only in the 5 GHz frequency band.

D. 802.11ac is not backwardly compatible with 802.11n or 802.11a.

What term correctly completes the following sentence?

802.11a/b/g used a mandatory 800ns guard interval. 802.11n introduced anoptional short 400ns guard interval. Guard intervals (GI) are necessary in OFDM to reduce the likelihood of interference between two consecutive ____________.

A. Frames

B. Packets

C. Bits

D. Symbols

In addition to throughput enhancements, what other improvements does a dual-band 802.11ac AP provide when compared with 802.11a/g APs? (Choose 2)

A. Introduces "fast transition" roaming protocols for VoWiFi phones

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

C. Improves service quality for real-time applications at greater distances

D. Increases in receive sensitivity enhance RTLS location accuracy

E. Stronger security with more robust encryption modes.

In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping? (Choose 2)

A. Channels 5 and 10

B. Channels 1 and 5

C. Channels 3 and 7

D. Channels 2 and 8

E. Channels 8 and 11

F. Channels 10 and 13

The network administrator at XYZ Company recently attended a training class on wireless security and realized that heshould update the corporate security policy to address WLAN technology. The network administrator is listing the items that should be addressed in the security policy update, and has asked for your input.

What WLAN topics should be addressed by a companysecurity policy? (Choose 3)

A. Theft prevention and data security of WLAN infrastructure devices

B. Wireless intrusion monitoring and response procedures

C. WLAN performance analysis baseline documentation

D. Wired network performance analysis andbaseline documentation

E. Training of the IT staff on WLAN operational security

F. User density planning and AP client association thresholds

As defined in the 802.11 specification, legacy Power Save requires an inefficient back-and- forth frame exchange process. Due to this inefficiency, many WLAN device implementations use a variation of 802.11 Power Save to accomplish the same function.

What non-standard power save behavior is used by most Wi-Fi devices in actual legacy Power Save implementations?

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

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

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

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

What statements about the SSID are true? (Choose 2)

A. The SSID is a security session identifierused in RSNs.

B. The SSID must be included in an association request frame.

C. The SSID is an alphanumeric value assigned to device manufacturers by the IEEE.

D. The SSID is a pseudo-random number assigned to each client by an AP.

E. The SSID is an alphanumeric value with a maximum length of 32 octets.

F. When configuring a new network, creating an SSID is optional.

The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz).

What is the center frequency of channel 4?

A. 2.413 GHz

B. 2.417 GHz

C. 2.422 GHz

D. 2.427 GHz

E. 2.437 GHz

In a long-distance RF link, whatstatement about Fade Margin is true?

A. Fade Margin is an additional pad of signal strength designed into theRF system to compensate for unpredictable signal fading.

B. The Fade Margin of a long-distance radio link should be equivalent to the receiver's antenna gain.

C. A Fade Margin is unnecessary on a long-distance RF link if more than 80% of the first Fresnelzone is clear of obstructions.

D. The Fade Margin is a measurement of signal loss through free space, and is a function of frequency and distance.

What problems may exist for a multiple channel architecture (MCA) WLAN when its APs are all operating at full power (typically 100mW)? (Choose 2)

A. Wi-Fi enabled voice handsets with low transmit power can experience asynchronous downlink and uplink performance.

B. WLAN client stations can experience the hidden node problem when located near each other within the same cell.

C. The mismatched power between WLAN client stations and APs violates regulatory and IEEE signal quality requirements.

D. Cell size may be too large, causing co-channel interference to adjacent cells and reducing system capacity.

E. APs operating in the 2.4 GHz band wouldprevent microwave ovens and analog video cameras from functioning.

What feature was introduced in the 802.11h amendment in order to uphold regulatory requirements for 5 GHz operations.

A. 256-QAM

B. Distributed Coordination Function (DCF)

C. Transmit Power Control(TPC)

D. Radio Resource Management (RRM)

What statement about the SSID is true?

A. The SSID is a security sessionidentifier used in RSNs.

B. The SSID must be included in an association request frame.

C. The SSID is an alphanumeric value assigned to devicemanufacturers by the IEEE.

D. The SSID is a pseudo-random number assigned to each client by an AP.

You are selecting antennas for a WLAN operating in the 5 GHz frequency band. What specifications should be evaluated for an antenna before it is implemented in this WLAN system? (Choose 3)

A. 802.11ad compatibility

B. TPCsupport

C. Impedance in Ohms

D. Elevation Beamwidth

E. Return Loss Rating

F. Operating Frequencies