Most Recent Certified Wireless Network Administrator (CWNA) CWNA-107 Training Tools

NEW QUESTION 1
You are deploying a WLAN monitoring solution that utilizes distributed sensor devices. Where should sensors be deployed for best results? Choose the single best answer.

• A. Every 20 feet and alongside each AP
• B. Closer to the APs
• C. Closer to the client devices
• D. IN critical areas where WLAN performance must be high

Answer: C

NEW QUESTION 2
You are configuring an access point to use channel 128. What important fact should be considered about this channels?

• A. It is a 22 MHz channel so it will overlap with the channels above and below it
• B. It is a 2.4 GHz frequency band 40 MHz channel, so it should not be used
• C. It is a channel that is unsupported by most access points
• D. It is a channel that likely requires DFS when used

Answer: D

NEW QUESTION 3
Which one of the following 802.11 PHYs is more likely to be used in an industrial deployment but not likely to be used in standard office deployments?

• A. SIG
• B. VHT
• C. OFDM
• D. HT

Answer: B

NEW QUESTION 4
When using a spectrum to look for non Wi-Fi interference sources, you notice significant interference across the entire 2.4 GHz band (not on a few select frequencies) within the desktop area of a users workspace, but the interference disappears quickly after just 2 meters. What is the most likely cause of this interference?

• A. USB 3 devices in the user’s work area
• B. Bluetooth devices in the user’s work area
• C. Excess RF energy from a nearby AP
• D. Unintentional radiation from the PC power supply

Answer: D

Explanation:
https://www.reddit.com/r/electronics/comments/2i2s76/is_the_emf_of_a_pc_without_a_case_much_higher/?st=

NEW QUESTION 5
What fact is true regarding controllers and Aps in a split-MAC architecture?

• A. Using centralized data forwarding, frames leaving the Aps are never tagged Ethernet frames with VLAN identifiers
• B. An IP tunnel is established between the AP and controller for AP management and control functions
• C. With 802.1X/EAP security, the AP acts as the supplicant and the controller acts as the authenticator
• D. Management and data frames must be processed locally by the AP, while control frames are sent to the controller

Answer: B

NEW QUESTION 6
When performing a validation survey for a Multiple Channel Architecture (MCA) system in a multi-tenant building with five floors, what aspect should you, as the surveyor, keep in mind?

• A. The RF interference caused by passing airplanes supporting on-board Wi-Fi should be a prime consideration
• B. The channel reuse pattern should be three dimensional with the RF cell extending coverage of each access point to other floors
• C. The omni-directional antennas of the access points should be oriented parallel to the floor to maximize the coverage pattern across as many floors as possible
• D. The Fresnel Zone is completely blocked between floors so each floor is considered a separate site survey

Answer: B

NEW QUESTION 7
When considering data rates available in HT and VHT PHY devices, in addition to the modulation, coding, channel width, and spatial streams, what impacts the data rate according to the MCS tables?

• A. The frequency band in use
• B. The client drives
• C. The guard interval
• D. The height of the antennas

Answer: C

Explanation:
Reference https://arxiv.org/pdf/1702.03257.pdf

NEW QUESTION 8
Option 43 must be configured to allow access points to locate controllers. In what network service should this option be configured?

• A. DHCP
• B. LDAP
• C. DNS
• D. RADIUS

Answer: A

Explanation:
Reference
https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/97066-dhcp-option-43-00.html

NEW QUESTION 9
What is an advantage of using WPA2-Personal instead of WEP-128 as a security solution for 802.11 networks?

• A. WPA2-Personal uses CCMP for encryption, and WEP-128 uses TKIP for encryption
• B. WPA2-Personal uses dynamic encryption keys, and WEP-128 uses static keys
• C. WPA2-Personal uses 802.1X/EAP for authentication, and WEP-128 uses preshared keys
• D. WPA2-Personal is based on IEEE 802.11 industry standards, but WEP is not

Answer: B

NEW QUESTION 10
What Linux shell command can be used to view the hardware and PHY capabilities of a wireless adapter in detail including channel widths, output power setting, channels supported, and more?

• A. ifconflg
• B. iw phy
• C. netsh wlan show device
• D. iwconflg

Answer: D

NEW QUESTION 11
You are reporting on the RF environment in your facility. The manager asks you do describe the noise floor noted on the report. Which of the following is the best explanation:?

• A. The energy radiated by flooring materials that causes interference in the 2.4 GHz and 5 GHz bands.
• B. The noise caused by elevators, microwave ovens, and video transmitters.
• C. The RF energy that exists in the environment from intentional and unintentional RF radiators that forms the baseline above which the Intentional signal of your WLAN must exist.
• D. The extra energy radiated by access points and client devices beyond that intended for the signal.

Answer: C

Explanation:
Reference
http://blog.prosig.com/2008/04/14/what-is-db-noise-floor-dynamic-range/

NEW QUESTION 12
You are tasked with performing a throughput test on the WLAN. The manager asks that you use open source tools to reduce costs. What open source tool is designed to perform a throughput test?

• A. IxChariot
• B. Python
• C. PuTTy
• D. iPerf

Answer: D

NEW QUESTION 13
In a mesh BSS (MBSS), according to the 802.11-2016 standard, what device connect the mesh to an Ethernet network?

• A. Mesh Gate
• B. Mesh Switch
• C. Mesh Router
• D. Mesh Portal

Answer: A

Explanation:
Reference https://www.cwnp.com/uploads/802-11s_mesh_networking_v1-0.pdf

NEW QUESTION 14
What terms accurately complete the following sentence?
The IEEE 802.11-2016 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 and is deprecated.

• A. 802.1X/EAP, WEP
• B. CCMP, TKIP
• C. TLS, SSL
• D. RC5, RC4

Answer: B

NEW QUESTION 15
What is always required to establish a high quality 2.4 GHz RF link at a distance of 3 miles (5 kilometers)?

• A. Grid antennas at each endpoint
• B. A Fresnel Zone that is at least 60% clear of obstructions
• C. A minimum antenna gain of 11 dBi at both endpoints
• D. Minimum output power level of 2 watts

Answer: B

NEW QUESTION 16
What factor does not influence the distance at which an RF signal can be effectively received?

• A. Free Space Path Loss
• B. Receiving station’s radio sensitivity
• C. Transmitting station’s output power
• D. Receiving station’s output power

Answer: B

NEW QUESTION 17
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