NEW QUESTION 1
The To DS bit is set to 0 and the From DS is set to 1. What best describes this 802.11 frame?

• A. A frame being transmitted from an AP to a client STA
• B. A frame being transmitted in a mesh BSS
• C. A frame being transmitted from a client STA to an AP
• D. A frame being transmitted directly from one client STA to another

Answer: A

NEW QUESTION 2
What action is taken automatically by 802.11 APs and client STAs as the signal strength of the link weakens in order to improve the quality of the RF communications overall?

• A. Output power is increased
• B. RSSI is increased
• C. Data rates are reduced
• D. Antenna gain is increased

Answer: C

NEW QUESTION 3
You are analyzing a problem with a specific client adapter. The vendor specifications sheet does not provide detailed information.
What tool can you use to provide the most detailed specification information in many such cases?

• A. WLAN controller
• B. Spectrum analyzer
• C. FCC ID Search
• D. Wi-Fi finder

Answer: C

NEW QUESTION 4
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 5
You require 802.11ac capture solution. You want to capture using native operating system tools if possible.
What operating system has built-in ability to capture 802.11ac frames assuming it is running on the appropriate laptop hardware?

• A. Windows 10
• B. Mac OS X
• C. Windows 7
• D. Windows 8.1

Answer: B

NEW QUESTION 6
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

NEW QUESTION 7
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 8
You must report on frame types seen on the WLAN. You want to list the frame types by both name and binary value.
What frame type is represented by the binary value 011010, which includes the Type and Subtype values?

• A. Beacon
• B. PS-Poll
• C. Authentication
• D. Association Request

Answer: B

NEW QUESTION 9
When using a commercial WLAN protocol analyzer, you notice that it is listing vendor names for some APs and client STAs.
What is the source of this information?

• A. Broadcast name resolution
• B. Banner grabbing
• C. DNS name resolution
• D. Vendor OUI values

Answer: D

NEW QUESTION 10
What is the Extended IFS used in 802.11 contention?

• A. When the higher data rates are used and you want the fastest medium access times
• B. When the lower data rates are used and you want the fastest medium access times
• C. When 802.11ac must coexist with 802.11n
• D. When a frame reception begins but the received frame is incomplete or corrupted based on the FCS

Answer: C

NEW QUESTION 11
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 12
Given: Protocol analyzer often have useful graphical dashboards providing information about the health and operations of the WLAN.
What is a valid use of a graph showing the Top APs Based on Active Associations?

• A. Ensuring compliance with corporate security policies
• B. Discovering the total number of client STAs on your network
• C. Evaluating the capacity handling on a specific channel
• D. Locating overloaded APs

Answer: D

NEW QUESTION 13
When evaluating modulation and coding schemes, you must determine the best coding rate available. In 802.11 MCS tables, what is the best coding rate from the perspective of highest data rates?

• A. 5/6
• B. 3/4
• C. 2/3
• D. 1/2

Answer: A

NEW QUESTION 14
You are tasked with describing the various frames used in 802.11 communications.
What frame is used for spectrum management, fast BSS transition and some other actions taken within a BSA?

• A. BlockAck
• B. CTS
• C. PS Poll
• D. Action

Answer: D

NEW QUESTION 15
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 16
iPerf is a tool used in what category of testing?

• A. Configuration
• B. Connection
• C. Name resolution
• D. Throughput

Answer: D

NEW QUESTION 17
The manager in the security group is concerned about compliance with security policies on the WLAN. The budget is not available for a full WIPS SOLUTION. He has asked you to implement a process that will verify compliance.
What would you recommend in such a scenario?

• A. Use the built-in spectrum analyzer features of the APs to ensure that WPA2-Enterprise is implemented throughout the organization
• B. Simplify enable 802.11w, which will enforce management frame compliance
• C. Use a laptop-based protocol analyzer that provides compliance reporting to monitor the environment on a periodic basis
• D. Implement AP-based sensors throughout the facility and then monitor for performance issues with these sensors

Answer: C

NEW QUESTION 18
You are concerned about attackers gaining access to your WLAN from outside the facility.
Why does reducing the output power on the APs not provide sufficient certainty that an attacker outside the facility cannot gain access?

• A. Because RF signals can be received even when weak if using a Mac OS X computer
• B. Because the attacker can simply use high gain antennas
• C. Because the attacker can increase the output power of the radio on the client
• D. Because the attacker will simplify use a lower gain antenna and a radio with higher receive sensitivity

Answer: B

NEW QUESTION 19
You have been recently hired as the wireless network administrator for an organization spread across seven locations. They have deployed more than 100 APs, but they have not been managed in either an automated or manual process for more than 18 months.
Given this length of time, what is one of the first things you should evaluate from a support perspective?

• A. The data rates allowed
• B. The VLANs in use
• C. The channels in use
• D. The firmware revision

Answer: D

NEW QUESTION 20
You have received reports of performance problems in a BSS. One specific user is indicating that her downloads are taking a very long time compared to other users around her. You want to determine if the AP is sending frames multiple times to get through to the user’s computer.
Where should you monitor with the protocol analyzer to see retries from the AP in this scenario?

• A. Directly in the middle of the AP and client STA
• B. Very near the AP
• C. Capture from another AP in another BSS
• D. Very near the client STA

Answer: B

NEW QUESTION 21
You are attempting to determine timing information within a packet capture of a WLAN protocol analyzer.
What time is used to display the time the packet was captured based on the system clock in the computer?

• A. Relative
• B. Arrival
• C. Interframe
• D. Delta

Answer: B

Explanation:
Arrival Time—This is the time that is assigned to a packet after it is processed by the host system. This timestamp is dependent upon the system clock of the computer, and designates when the packet was captured.

NEW QUESTION 22
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 23
What is the formula used to calculate the Duration field value in an RTS frame?

• A. RTS Duration field = CTS duration
• B. RTS Duration field = Data or management to be sent frame duration
• C. RTS Duration field = Data or management frame to be sent duration + CTS duration + one ACK duration + three SIFS
• D. RTS Duration field = Data or management frame to be sent duration + CTS duration

Answer: C

NEW QUESTION 24
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