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NEW QUESTION 1
ABC Company requires the ability to identify and quickly locate rogue devices. ABC has chosen an overlay WIPS solution with Wi-Fi sensors that use dipole antennas to perform this task. No other sensors are included. Use your knowledge of location tracking techniques to answer the question.
Which one of the following location methods is not available in the described system?
- A. GPS Positioning
- B. Time Difference of Arrival (TDoA)
- C. RF Fingerprinting
- D. Trilateration of RSSI measurements
Answer: C
NEW QUESTION 2
You are using a Wireless Aggregator utility to combine multiple packet captures. One capture exists for each of channels 1, 6 and 11.
What kind of troubleshooting are you likely performing with such a tool?
- A. Fast secure roaming problems.
- B. Narrowband DoS attack detection.
- C. Interference source location.
- D. Wireless adapter failure analysis.
Answer: C
NEW QUESTION 3
The data rate for a data frame is 150 Mbps in 5 GHz. What rate is used to transmit the PHY header information?
- A. 1 Mbps
- B. 150 Mbps
- C. 75 Mbps
- D. 6 Mbps
Answer: A
NEW QUESTION 4
You are creating a baseline configuration for a pool of 100 laptops related to Wi-Fi. The laptops have dual-band 802.11ac adapters. They are configured for aggressive roaming.
What additional setting might you configure to ensure they access the WLAN on the channels with the least interference assuming the enterprise WLAN is well-designed?
- A. Band preference
- B. USB speed
- C. 802.11h
- D. Power management
Answer: A
NEW QUESTION 5
iPerf is a tool used in what category of testing?
- A. Configuration
- B. Connection
- C. Name resolution
- D. Throughput
Answer: D
NEW QUESTION 6
You need to determine RF activity over time in a spectrum analyzer. It is to be able to see the activity and the amplitude of that activity.
What kind of view should be used?
- A. Real-time FFT
- B. Device listing
- C. Channel listing
- D. Swept spectrogram
Answer: D
Explanation: The FFT shows spectral activity in the frequency domain, while waterfall or swept spectrogram views attempt to represent RF activity over time
NEW QUESTION 7
You suspect an interfere may exist in a BSS that is experiencing sporadic problems. You want to identify and locate the device. The actual device identify is not known.
What tool should be used for this purpose?
- A. Spectrum analyzer
- B. Cable tester
- C. Throughput tester
- D. Protocol analyzer
Answer: A
NEW QUESTION 8
You work as an SE for a value-added reseller. A client has an existing deployment of 802.11n Aps and wants to upgrade several BSSs to 802.11ac.
What hardware feature of some enterprise Aps may allow for this without a forklift upgrade?
- A. Adding an 802.11ac module to the existing APs
- B. Simply check the Enable 802.11ac checkbox in the web-based configuration interface
- C. Replace the antennas with 802.11ac antennas
- D. Converting the 802.11n radio to an 802.11ac radio through software
Answer: B
NEW QUESTION 9
You have implemented centralized, infrastructure-based spectrum analysis. The Aps are configured to perform spectrum analysis in an ad-hoc manner and will go offline as Aps to perform this duty when needed.
What unique method of spectrum analysis monitoring is provided by this solution that is not typically available in a laptop-based analyzer?
- A. Web-based viewing
- B. Real-time FFT
- C. Band selection
- D. RBW adjustments
Answer: D
NEW QUESTION 10
You view a protocol analyzer capture decode with the following protocol frames listed in the following order (excluding the ACK frames): 1) 802.11 Probe Request and 802.11 Probe Response 2) 802.11 Auth and another 802.11 Auth 2) 802.11 Assoc Req and 802.11 Assoc Rsp 4) EAPOL-Start 5) EAP Request and EAP Response 6) EAP Request and EAP Response 7) EAP Request and EAP Response 8) EAP Request and EAP Response 9) EAP Request and EAP Response 10) EAP Success 19) EAPOL-Key (4 frames in a row)
What are you seeing in the capture file?
- A. WPA2-Personal authentication
- B. Wi-Fi Protected Setup with PIN
- C. WPA2-Enterprise authentication
- D. 802.1X with Dynamic WEP
Answer: C
NEW QUESTION 11
To what data rates can a 5 GHz PHY device shift when changers occur in the signal strength?
- A. 11, 5.5, 2, 1
- B. 24, 18, 12, 5.5
- C. 24, 18, 11, 2
- D. 24, 18, 12, 6
Answer: D
NEW QUESTION 12
As the WLAN engineer in your organization, you must troubleshoot performance problems related to co-channel interference (CCI).
What is a good measurement of CCI impact in addition to the number of APs seen on a channel?
- A. The frequency used
- B. Non-Wi-Fi device count
- C. Retries
- D. Utilization
Answer: A
NEW QUESTION 13
As the WLAN administrator in your organization you are responsible for troubleshooting connection issues. Several STAs are connecting to the network, but are unable to communicate after connection. You suspect a DHCP problem. After capturing traffic on the wired-side of the AP, you want to view only DHCP traffic.
What filter in Wireshark can be used for this purpose?
- A. DHCPv6
- B. DHCP
- C. BOOTP
- D. DHCPv4
Answer: C
NEW QUESTION 14
HOTSPOT
A manager at a retail outlet has complained that an incident occurred allowing a STA to launch an attack against another STA connected to their public Wi-Fi hotspot. He has asked you to troubleshoot the situation and verify that all possible measured are being taken to prevent this.
What configuration should you check in the AP?
[MISSING]
Answer:
NEW QUESTION 15
You are concerned with management overhead in your WLAN. When evaluating the network, you note that each dual-band AP provides for 4 SSIDs in each band with three secure SSIDs and one Open System SSID. The network runs only 802.11ac APs and uses 20 MHz channels in 2.4 GHz and 400 MHz channels in 5 GHz.
What can you do to reduce the impact of beacon frames on CCI and channel utilization?
- A. Increase the beacon interval
- B. Use only 40 MHz channels
- C. Use the same security across all SSIDs
- D. Disable SSID broadcasting
Answer: D
NEW QUESTION 16
You are troubleshooting VoIP WLAN issues. When performing a PING to a remote device that would be involved in a call link, you see that the time value averages 220 milliseconds.
How much extra delay beyond that recommend for VoIP links is in this link?
- A. There is not enough information because the PING command give round-trip-times
- B. There is 70 milliseconds more delay than recommended
- C. There is 80 milliseconds more delay than recommended
- D. There is no extra delay beyond that recommended, instead there is 80 milliseconds less
Answer: D
NEW QUESTION 17
You are considering the performance of a BSS based on different PHY types used. In the BSS, one device must use ERP as it does not support HT in its 2.4 GHz band.
What is the duration of the interframe space for this ERP device for standard data frame transmissions?
- A. 10 microseconds
- B. 16 microseconds
- C. 28 microseconds
- D. 9 microseconds
Answer: B
NEW QUESTION 18
You are using a laptop-based protocol analyzer to scan all channels and determine the basic configuration of the WLAN Basic Service Set in your facility. You are scanning all channels. All configured with default settings.
What can you change to cause the scan to run faster while still APs are capturing beacon frames on all the channels?
- A. Configure the RBW to more than 120 kHz
- B. Configure the scan time for channels to 300-500 ms
- C. Configure the fragmentation threshold to 1500 bytes
- D. Configure the scan time for channels to <100 ms
Answer: A
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