Use Real CWNA-108 - 100% Cover Real Exam Questions [Sep-2021]
Dumps Brief Outline Of The CWNA-108 Exam - Lead1Pass
NEW QUESTION 17
What standard is referenced into the 802.11-2012 specification and is recommend for robust WLAN client security?
- A. WEP
- B. IPSec VPN
- C. 802.1X/EAP
- D. SSID hiding
Answer: C
NEW QUESTION 18
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 channel reuse pattern should be three dimensional with the RF cell extending coverage of each access point to other floors
- B. The RF interference caused by passing airplanes supporting on-board Wi-Fi should be a prime consideration
- C. The Fresnel Zone is completely blocked between floors so each floor is considered a separate site survey
- D. 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
Answer: A
NEW QUESTION 19
A WLAN is implemented using wireless controllers. The APs must locate the controllers when powered on and connected to the network. Which one of the following methods is commonly used to locate the controllers by the APs?
- A. NTP
- B. DHCP
- C. SNMP
- D. GRE
Answer: B
NEW QUESTION 20
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
- A. OFDM was first introduced in 802.11a and is used by the ERP, HT and VHT PHYs as well.
- B. OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.
- C. OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
- D. OFDM modulation is used only in 5 GHz 802.11 transmissions.
Answer: A
Explanation:
Explanation
NEW QUESTION 21
In an 802.11n 2.4 GHz BSS, what prevents each station from using the full network data rate (e.g. 216.7 Mbps) for user data when multiple clients are actively exchanging data with the AP?
- A. Half of the bandwidth is allocated to uplink traffic and half to downlink traffic
- B. All data frames must be acknowledged and the medium is shared
- C. Radio receiver hardware cannot process data is quickly as it can be transmitted
- D. APs do not have sufficient wired connection speeds to the LAN, even at 1 Gbps connections, with
802.11n and earlier APs
Answer: B
NEW QUESTION 22
The requirements for a WLAN you are installing state that it must support unidirectional delays of less than
150 ms and the signal strength at all receivers can be no lower than -67 dBm. What application is likely used that demands these requirements?
- A. FTP
- B. VoIP
- C. E-Mail
- D. RTLS
Answer: B
NEW QUESTION 23
What item is essential for performing a manual RF site survey for a warehouse facility?
- A. Predictive site survey software that supports highly directional antennas
- B. Low-gain omni antennas for APsmounted high on warehouse ceilings
- C. A facility map with an explanation of applications used in each area
- D. I-Beam mounting kits for hanging temporary access points
Answer: C
NEW QUESTION 24
A client complains of low data rates on his computer. When you evaluate the situation, you see that the signal strength is -84 dBm and the noise floor is -96 dBm. The client is an 802.11ac client and connects to an 802.11acAP. Both the client and AP are 2x2:2 devices.
What is the likely cause of the low data rate issue?
- A. Too few spatial streams
- B. Lack of support for 802.11n
- C. Weak signal strength
- D. CAT5e cabling run to the AP
Answer: C
NEW QUESTION 25
You are reconfiguring an AP to use the short guard interval. How long will the new guard interval duration be after the change?
- A. 104 ms
- B. 10 ms
- C. 400 ns
- D. 800 ns
Answer: C
NEW QUESTION 26
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
- A. OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.
- B. OFDM modulation is used only in 5 GHz 802. 11 transmissions.
- C. OFDM was first introduced in 802. 11a and is used by the ERP, HT and VHT PHYs as well
- D. OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
Answer: B
NEW QUESTION 27
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 28
You manage a WLAN with 100 802.11ac access points. All access points are configured to use 80 MHz channels. In a particular BSS, only 40 MHz communications are seen. What is the likely cause of this behavior?
- A. The AP is improperly configured to use only 40 MHz of the 80 MHz allocated bandwidth
- B. All clients implement single spatial stream radios
- C. The short guard interval is also enabled
- D. The clients are all 802.11n STAs or lower
Answer: D
Explanation:
https://7signal.com/802-11ac-migration-part-2-whats-nobodys-telling-you-about-80mhz-and-160mhz-channel-bonding
NEW QUESTION 29
Which one of the following is not a factor considered when calculating the Link Budget for an outdoor point-to- point WLAN bridge link?
- A. Transmit power
- B. MU-MIMO capabilities of the bridges
- C. Operating frequency
- D. Receive antenna gain
Answer: B
NEW QUESTION 30
What factor is likely to cause the least impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS?
- A. Implementation of several other clients in the same BSS using 802.11g radios
- B. RF interference from more than 10 nearby Bluetooth transmitters
- C. Implementing Fast BSS Transition (FT) for roaming
- D. Increasing or decreasing the number of spatial streams in use by the client station and AP
Answer: C
NEW QUESTION 31
An 802.11-based network uses an AP and has several connecting clients. The clients include iPhones, iPads, laptops and one desktop. What WLAN use case is represented?
- A. WPAN
- B. BSS
- C. Ad-hoc
- D. IBSS
Answer: B
Explanation:
Explanation/Reference:
NEW QUESTION 32
In addition to coverage analysis results, what should be included in a post-deployment site survey report to ensure WLAN users experience acceptable performance?
- A. Application Layer protocol availability analysis results
- B. Capacity analysis results
- C. WAN interface analysis results
- D. Layer 4 protocol availability analysis results
Answer: B
Explanation:
Explanation/Reference:
NEW QUESTION 33
A string of characters and digits is entered into an AP and a client STA for WPA2 security. The string is 8 characters long. What is this string called?
- A. WEP key
- B. PSK
- C. MSK
- D. Passphrase
Answer: B
NEW QUESTION 34
What statement accurately describes the RF cables and connectors that are used in an
802.11 WLAN system?
- A. Two RF connectors of the same type (e.g. SMA), manufactured by different companies, may vary in specifications.
- B. Some RF connectorsdo not cause insertion loss.
- C. Large diameter RF cables cause greater loss than small diameter cables.
- D. 75 and 125 ohms are the typical impedances of 802.11 WLAN connectors.
Answer: A
NEW QUESTION 35
As XYZ Company's wireless specialist, you have been asked to troubleshoot some unexpected frame patterns in a wireless protocol capture. Your peers explain that the network's beacon frames are inconsistent. That is, the BSSID is the same for all beacons, but the source address varies between three different addresses.
What network configuration would cause this beacon frame behavior?
- A. Three APs still share the same default configuration.
- B. The beacons are from an IBSS instead of a BSS
- C. A single AP supports multiple BSSs with different SSIDs
- D. A virtual cell single channel network has been implemented
Answer: B
NEW QUESTION 36
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. Excess RF energy from a nearby AP
- B. Unintentional radiation from the PC power supply
- C. USB 3 devices in the user's work area
- D. Bluetooth devices in the user's work area
Answer: B
NEW QUESTION 37
In addition to coverage analysis results, what should be included in a post-deployment site survey report to ensure WLAN users experience acceptable performance?
- A. Application Layer protocol availability analysis results
- B. Capacity analysis results
- C. WAN interface analysis results
- D. Layer 4 protocol availability analysis results
Answer: B
NEW QUESTION 38
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