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Last Updated: Jul 21, 2026
No. of Questions: 60 Questions & Answers with Testing Engine
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| Section | Weight | Objectives |
|---|---|---|
| 802.11 Communications | 25% | - WLAN architectures and performance impact - Authentication and association processes - Security negotiation and frame exchanges |
| Processes for Troubleshooting | 5% | - Troubleshooting methodologies - OSI model application - Analysis and operating system tools |
| Troubleshooting Common Issues | 20% | - Connectivity and roaming problems - Security-related operational issues - Performance and throughput issues - Interference and coexistence problems |
| Protocol & Spectrum Analysis | 35% | - Interpretation of spectrum and protocol captures - Channel access mechanisms - 802.11 PHY and MAC frame formats - Spectrum analysis fundamentals |
| WLAN Hardware | 15% | - AP and client radio functionality - Transmitters, receivers, and antennas - RF characteristics and measurement |
1. Several users have reported WLAN network connection issues and the users connect to the same AP. These users are spread throughout a 320 square meter area. Using a spectrum analyzer, you see RF energy across the entire 2.4 GHz band at significant signal strength levels. The users all connect using either HT or ERP devices.
What is the likely cause of this problem within this area?
A) Video camera
B) Microwave oven
C) Bluetooth devices
D) Wide-band jammer
2. You are performing 802.3 network analysis. For what are the DA and SA fields used in the frame header?
A) Defining either distance access routing or strict access routing
B) They are not used; addresses are only used in the 802.11 header
C) Defining the addresses sending and receiving the frame
D) Defining either direct access or sourced access
3. 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) Utilization
B) The frequency used
C) Retries
D) Non-Wi-Fi device count
4. 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) Swept spectrogram
B) Channel listing
C) Real-time FFT
D) Device listing
5. 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 from a client STA to an AP
C) A frame being transmitted directly from one client STA to another
D) A frame being transmitted in a mesh BSS
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: C | Question # 3 Answer: B | Question # 4 Answer: A | Question # 5 Answer: A |
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