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CWNP CWNA-106 Certified Wireless Network Administrator Exam Practice Test

Demo: 18 questions
Total 138 questions

Certified Wireless Network Administrator Questions and Answers

Question 1

A company has hired you to perform a pre-deployment site survey of their facility. During an interview, the network manager informs you that the new wireless network must use 5 GHz bands and OFDM, and VoWiFi handsets will be used extensively over the wireless network.

What items do you need to include in the RF site survey report? (Choose 2)

Options:

A.

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

B.

Codec types and sampling rates for each VoWiFi phone

C.

Security parameters and configuration steps for VoWiFi handsets.

D.

Test results from an active survey with a VoWiFi handset

E.

Results of OFDM versus ERP performance in each BSA

Question 2

XYZ Corporation is experiencing connectivity problems with their existing building-to-building bridge link. A concrete wall on the roof of one building is partially blocking the Fresnel Zone, and the connection is dropping many frames. The administrator moves the antenna to an area not obstructed by the concrete wall and then realizes the RF cable cannot reach the new location.

If an extension cable is added to move the antenna, what are the likely results?

Options:

A.

The data throughput rate will increase because VSWR will decrease.

B.

The Equivalent Isotropically Radiated Power (EIRP) will decrease.

C.

The antenna’s azimuth beamwidth will decrease.

D.

The size of the Fresnel zone will increase.

E.

The likelihood of a direct lightning strike will increase.

Question 3

What statement about 802.11 WLAN performance is true?

Options:

A.

Use of larger frame sizes results in greater throughput in low interference environments.

B.

BSS support for 65 KB A-MPDUs will increase the maximum data rate available to client devices.

C.

In 802.11ac, changing the security mechanism from WPA2-Personal to WPA2-Enterprise will enable the VHT MCS rates.

D.

Compared to an Independent BSS, an Infrastructure BSS can provide almost twice the throughput between wireless nodes.

E.

Use of short guard intervals improves reliability and throughput in high multipath environments

Question 4

What is the intended use for the WLAN hardware known as a pole or mast mount unit?

Options:

A.

Mounting a lightning arrestor to a grounding rod

B.

Mounting an omnidirectional antenna to a mast

C.

Mounting an RF amplifier to a dipole antenna

D.

Mounting a PoE injector to a perforated radome

E.

Mounting an access point to a site survey tripod

Question 5

What phrase defines Equivalent Isotropically Radiated Power (EIRP)?

Options:

A.

The power output from the radio into the RF cable

B.

The power output from the radio after cable losses

C.

The highest RF signal strength that is transmitted from a given antenna

D.

Reflected power due to an impedance mismatch in the signal path

E.

Power supplied from the transmission line to the antenna input

Question 6

What HT technology requires MIMO support on both the transmitter and receiver?

Options:

A.

Spatial multiplexing

B.

Short guard intervals

C.

Maximal ratio combining

D.

Orthogonal Frequency Division Multiplexing

Question 7

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)

Options:

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.

Question 8

ABC Company has thousands of Wi-Fi users accessing their network on a daily basis. Their WLAN consists of 700 access points, 6 WLAN controllers, and a wireless network management system.

What network functions are performed by the enterprise-class WNMS? (Choose 3)

Options:

A.

RF pre-deployment planning and post-deployment reporting of access point locations on a floor plan

B.

Performance and security monitoring of WLAN controllers with alarms and notifications for administrative staff

C.

Radio management, fast roaming, key caching, and other centralized control plane operations

D.

Centralized bridging of guest data traffic and application of firewall and QoS policies to data

E.

Management of WLAN controller configuration and provisioning of firmware updates

F.

Generating, encrypting, and decrypting 802.11 frames and collecting RF radio data.

Question 9

ABC Company has just purchased a 6 dBi patch antenna. After performing some tests with the 6 dBi antenna, they have concluded that more antenna gain is needed to cover their outdoor courtyard. When choosing an antenna with higher gain, what other antenna characteristic will also always change?

Options:

A.

Fresnel Zone size

B.

Maximum input power

C.

Beamwidth

D.

Impedance

E.

VSWR Ratio

Question 10

A WLAN transmitter that emits a 200 mW signal is connected to a cable with 3 dB loss.

If the cable is connected to an antenna with 10 dBi gain, what is the EIRP at the antenna element?

Options:

A.

10 dBm

B.

13 dBm

C.

20 dBm

D.

26 dBm

E.

30 dBm

Question 11

What WLAN system feature is required to produce a scenario with the following configuration on a single access point? (Choose 2)

1. SSID = Guest / BSSID = AA:AA:AA:AA:AA:AA /

VLAN = 22 / Subnet = 192.168.22.0 / RF Channel = 6

2. SSID = Corporate / BSSID = BB:BB:BB:BB:BB:BB /

VLAN = 33 / Subnet = 192.168.33.0 / RF Channel = 6 / User Type A

3. SSID = Corporate / BSSID = BB:BB:BB:BB:BB:BB /

VLAN = 44 / Subnet = 192.168.44.0 / RF Channel = 6 / User Type B

Options:

A.

Multiple WLAN Profiles

B.

Call Admission Control

C.

Virtual Cell with SCA

D.

Access Categories

E.

User-based authentication

F.

Dual-radio AP hardware

G.

Integrated DHCP server

Question 12

What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) in IEEE 802.11 WLANs?

Options:

A.

802.11a and 11n use six (6) “pilot” subcarriers as a reference for the receiver to detect frequency and phase shifts of the signal.

B.

802.11a/g/n OFDM includes several combinations of modulation and coding to achieve data rates from 1-600 Mbps.

C.

With 802.11a OFDM, 16-QAM provides either 48 or 54 Mbps data rates, depending upon coding rates.

D.

802.11ac VHT-OFDM utilizes 256-QAM, which increases the data rate significantly over 64-QAM available in HT-OFDM.

E.

In 802.11a OFDM, fifty-six (56) subcarriers are used as parallel symbol transmission paths to carry data.

Question 13

What distinguishes an independent basic service set (IBSS) from an infrastructure basic service set (BSS)?

Options:

A.

An IBSS does not have a distribution system (DS), but a BSS does.

B.

An IBSS does not require beacon frames, but a BSS does.

C.

An IBSS does not support 802.11 authentication or association, but a BSS does.

D.

An IBSS does not support any 802.11ac enhancements, but a BSS does.

Question 14

What are two channel modes specified by the 802.11n (High Throughput) PHY? (Choose 2)

Options:

A.

20 MHz

B.

20/40 MHz

C.

40/80 MHz

D.

22 MHz

E.

80 MHz

F.

160 MHz

Question 15

What terms accurately complete the following sentence?

The IEEE 802.11-2012 standard specifies mandatory support of the ___________ cipher suite for Robust Security Network Associations, and optional use of the ___________ cipher suite, which is designed for use with pre-RSNA hardware.

Options:

A.

CCMP, TKIP

B.

802.1X/EAP, WEP

C.

TLS, SSL

D.

CCKM, WEP

E.

RC5, RC4

Question 16

What mechanisms are specified by the IEEE 802.11 standard to attempt to prevent multiple radios from transmitting on the RF medium at a given point in time? (Choose 3)

Options:

A.

Random backoff timer

B.

Clear channel assessment

C.

Network allocation vector

D.

Slot assessment value

E.

Collision detection

Question 17

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?

Options:

A.

2.413 GHz

B.

2.417 GHz

C.

2.422 GHz

D.

2.427 GHz

E.

2.437 GHz

Question 18

To ease user complexity, your company has implemented a single SSID for all employees. However, the network administrator needs a way to control the network resources that can be accessed by each employee based on their department.

What WLAN feature would allow the network administrator to accomplish this task?

Options:

A.

SNMP

B.

VRRP

C.

RBAC

D.

IPSec

E.

WIPS

F.

WPA2

Demo: 18 questions
Total 138 questions