Free CWNP CWNA-106 Practice Exam with Questions & Answers | Set: 3

Name: How to Pass CWNA-106 Exams
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SKU: cwna-106
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Questions 21

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

Options:

Counter Mode with CBC-MAC Protocol

Wi-Fi Protected Access v1 and v2

Internet Protocol Security

Extensible Authentication Protocol

GCM with Galois Message Authentication Code (GMAC) Protocol

Wired Equivalent Privacy

Temporal Key Integrity Protocol

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Questions 22

AP-1 is a 3x3:2 AP. STA-3 is a 3x3:3 client. What is the maximum number of spatial streams that can be used for a downlink HT-OFDM transmission from AP-1 to STA-3?

Options:

One spatial stream, because the definition of the AP indicates that it is capable of only one spatial stream.

Three spatial streams, because the definition of the client indicates that it is capable of only three spatial streams.

Two spatial streams, because the definition of the AP indicates that it is capable of only two spatial streams.

Three spatial streams, because the definition of the AP indicates that it is capable of only three spatial streams.

Questions 23

ABC Hospital is planning a Wi-Fi infrastructure upgrade where the 802.11b/g APs (HR/DSSS and ERP) would be replaced with new dual-radio 802.11n/802.11ac (HT and VHT) APs. ABC wants to minimize the time and cost associated with performing a new site survey, so they will be mounting all of the new APs in the same locations and with the same cable drops as the existing APs.

What is one performance drawback with this deployment method?

Options:

Multipath will increase, causing excessive layer-2 retransmissions. The retransmissions will cause latency for VoWiFi handsets.

Increased receiver sensitivity on the VHT APs will cause them to continually change channels to avoid co-channel interference.

If the existing UTP cabling is not Category 3 or better, the total Ethernet backhaul for each AP will be limited to 100 Mbps.

The existing WLAN plan, including the AP locations, may not provide the benefits seen in HT and VHT 802.11 PHY capabilities.

Questions 24

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

Options:

Mounting a lightning arrestor to a grounding rod

Mounting an omnidirectional antenna to a mast

Mounting an RF amplifier to a dipole antenna

Mounting a PoE injector to a perforated radome

Mounting an access point to a site survey tripod

Questions 25

Which features are incorporated in the 802.11-2012 specification and are recommend for robust WLAN client security? (Choose 2)

Options:

SSID hiding

CAPWAP with DTLS

802.1X/EAP

CCMP cipher suite

IPSec VPN

MAC address white lists

Questions 26

What is an advantage of using WPA2-Personal instead of WEP-128 as a security solution for 802.11 networks?

Options:

WPA2-Personal uses 802.1X/EAP for authentication, and WEP-128 uses preshared keys.

WPA2-Personal is based on IEEE 802.11 industry standards, but WEP is not.

WPA2-Personal uses CCMP for encryption, and WEP-128 uses TKIP for encryption.

WPA2-Personal uses dynamic encryption keys, and WEP-128 uses static keys.

WPA2-Personal requires complex 64-character hex keys, whereas WEP-128 requires weak 26-character hex keys.

Questions 27

If an 802.11 RF transmission reaches a receiving antenna simultaneously by direct and reflected paths, what effect will the reflected signal have on the signal that took the direct line-of-sight path?

Options:

The direct signal will only be received if the reflected signal is more than 180 degrees out of phase.

The direct signal cannot be received if the indirect signal is less than 90 degrees out-of-phase.

The signals will be distorted if the indirect signal arrives simultaneously at the receiver, but 90 degrees out-of-phase.

If the signals are in-phase, they will combine together, cancel one another out, and create a null.

Questions 28

Why is it recommended for a wireless network administrator to disable 1 Mbps and 2 Mbps data rates on the WLAN infrastructure? (Choose 2)

Options:

To improve capacity in the BSS

To reduce the size of the AP’s effective service area

To prevent 802.11b devices from associating

To maximize the range of the highest data rates

To prevent VoWiFi multicast frames

To enable support for long preambles

Questions 29

An 802.11 WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB of loss. The cable is connected to an antenna with 16 dBi of gain.

What is the EIRP power output?

Options:

10 mW

25 mW

50 mW

250 mW

1000 mW

Questions 30

The IEEE 802.11-2012 standard requires VHT capable devices to be backward compatible with devices using which other 802.11 physical layer specifications (PHYs)? (Choose 2)

Options:

OFDM

HR/DSSS

ERP-PBCC

DSSS-OFDM