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CWNA-108 Dumps Full Questions - Exam Study Guide
NEW QUESTION 27
The IEEE 802.11-2012 standard requires VHT capable devices to be backward compatible with devices using which other 802.11 physical layer specification (PHY)?
- A. DSSS
- B. ERP-PBCC
- C. HR/DSSS
- D. OFDM
Answer: D
NEW QUESTION 28
When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?
- A. VHT TXOP power save uses the partial AID in the preamble to allow clients to identify frames targeted for them.
- B. VHT TXOP power save allows stations to enter sleep mode and legacy Power Save does not.
- C. VHT TXOP power save allows the WLAN transceiver to disable more components when in a low power state.
- D. Legacy Power Save mode was removed in the 802.11ac amendment.
Answer: A
NEW QUESTION 29
In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping?
- A. 7 and 11
- B. 1 and 5
- C. 2 and 8
- D. 4 and 6
Answer: D
NEW QUESTION 30
Which of the following frequency ranges are specified for use by IEEE 802.11 radios? (Choose all that apply.)
- A. 5.725 - 5.875 GHz
- B. 2.4000 - 2.4835 GHz
- C. 5.470 - 5.725 GHz
- D. 902 - 928 MHz
- E. 5.15 - 5.25 GHz
Answer: A,B,C,E
NEW QUESTION 31
When antenna gain is reported in dBI, the gain of the antenna is compared to what theoretical antenna?
- A. Isotropic radiator
- B. Yagl
- C. Rubber ducky
- D. Dipole
Answer: A
Explanation:
https://www.cwnp.com/forums/posts?postNum=292616
NEW QUESTION 32
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. netsh wlan show device
- B. iw phy
- C. iwconflg
- D. ifconflg
Answer: C
NEW QUESTION 33
You are troubleshooting a controller-based AP that is unable to locate the controller. DHCP is not use and the controller is located at 10.10.10.81/24 while the AP is on the 10.10.16.0/24 network.
What should be inspected to verify proper configuration?
- A. NTP
- B. BOOTH
- C. DNS
- D. AP hosts file
Answer: C
NEW QUESTION 34
An IEEE 802.11 amendment is in the draft state. What impact does this draft amendment have on the 802.11 standard?
- A. Devices will be released based on the draft amendment and the draft amendment features are part of the standard.
- B. No impact: Draft amendments do not become part of the standard until a working group is formed.
- C. No impact: Until an amendment is ratified, it does not become part of the standard.
- D. The standard is changed to reflect the new capabilities as soon as amendment enters the draft stage.
Answer: C
NEW QUESTION 35
In a mesh BSS (MBSS), according to the 802.11-2016 standard, what device connect the mesh to an Ethernet network?
- A. Mesh Router
- B. Mesh Portal
- C. Mesh Gate
- D. Mesh Switch
Answer: C
NEW QUESTION 36
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. 2.427
- B. 2.413
- C. 2.417
- D. 2.422
Answer: A
NEW QUESTION 37
You recently purchased four laptops containing dual-band 802.11ac adapters. The laptops can connect to your 2.4 GHz network, but they cannot connect to the 5 GHz network. The laptops do not show the 5 GHz SSIds, which are different than the 2.4 GHz SSIDs. Existing devices can connect to the 5 GHz SSIDs with no difficulty. What is the likely problem?
- A. Interference from no-Wi-Fi sources
- B. DoS attack
- C. Faulty drivers Dos attack
- D. Interference from other WLANs
Answer: D
NEW QUESTION 38
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. IN critical areas where WLAN performance must be high
- B. Every 20 feet and alongside each AP
- C. Closer to the APs
- D. Closer to the client devices
Answer: D
NEW QUESTION 39
You administer a small WLAN with nine access point. As a small business, you do not rum a RADIUS server and use WPA2-Personal for security. Recently, you changed the passphrase for WPA2-personal in all Aps and clients. Several users are now reporting the inability to connect to the network at time and it is constrained to one area of the building. When using scanner, you see that the AP covering that area is online
- A. The clients are improperly configured
- B. The AP that covers the problem area has failed
- C. The AP that covers the problem area requires a firmware update
- D. The AP that covers the problem area is improperly configured
Answer: C
NEW QUESTION 40
You are implementing a VHT-capable AP. Which one of the following channels is available in the
802.11-2016 standard, which was not available before the ratification of 802.11ac?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 41
You are using a tool that allows you to see signal strength for all Aps in the area with a visual representation. It shows you SSIDs available and the security settings for each SSID. It allows you to filter by frequency band to see only 2.4 GHz networks or only 5 GHz networks. No additional features are available.
What kind of application is described?
- A. Protocol analyzer
- B. WLAN scanner tool
- C. Spectrum analyzer
- D. Site survey utility
Answer: B
NEW QUESTION 42
Lynne runs a small hotel, and as a value added service for his customers he has implemented a Wi-Fi hot-spot. Lynne has read news articles about how hackers wait at hot-spots trying to take advantage of unsuspecting users. He wants to avoid this problem at his hotel.
What is an efficient and practical step that Lynne can take to decrease the likelihood of active attacks on his customers' wireless computers?
- A. Require EAP-FAST authentication and provide customers with a username/password on their receipt.
- B. Implement an SSL VPN in the WLAN controller that initiates after HTTPS login.
- C. Enable station-to-station traffic blocking by the access points in the hotel.
- D. Implement Network Access Control (NAC) and require antivirus and firewall software along with OS patches.
Answer: C
NEW QUESTION 43
As an RF wave propagates through space, the wave front experiences natural expansion that reduces its signal strength in an area. What term describes the rate at which this expansion happens?
- A. MU-MIMO
- B. Fresnel zone thinning
- C. Inverse square law
- D. Ohm's law
Answer: C
NEW QUESTION 44
The OSI model is a 7-layer model for understanding the functions of a communication system.
What OSI sublayers are specifically addressed by the IEEE 802.11-2012 standard? (Choose 2)
- A. IP
- B. Network
- C. MAC
- D. PPDU
- E. Transport
- F. PLCP
Answer: C,F
NEW QUESTION 45
Return Loss is the decrease of forward energy in a system when some of the power is being reflected back toward the transmitter.
What will cause high return loss in an RF transmission system, including the radio, cables, connectors and antenna?
- A. High output power at the transmitter and use of a low-gain antenna
- B. A Voltage Standing Wave Ratio (VSWR) of 1:1
- C. The use of cables longer than one meter in the RF system
- D. An impedance mismatch between components in the RF system
Answer: D
NEW QUESTION 46
What 802.11 network configuration would result in multiple stations broadcasting Beacon frames with the same BSSID but with different source addresses?
- A. An IBSS is used instead of a BSS.
- B. An SCA network is in use.
- C. Multiple APs have been loaded with the same configuration from an image file.
- D. A single AP supports multiple BSSs with different SSIDs.
Answer: A
NEW QUESTION 47
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