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| Section | Objectives |
|---|---|
| RF and PHY Layer Analysis | - 802.11 PHY Standards Overview - Channelization and Spectrum Usage - RF Propagation and Signal Behavior |
| Spectrum Analysis and Tools | - Interference Identification (Wi-Fi and Non-Wi-Fi) - Spectrum Analyzer Usage - Wireshark and Packet Capture Analysis |
| WLAN Protocol Analysis | - 802.11 Frame Structure and Fields - Frame Types and Exchanges (Management, Control, Data) - MAC Layer Operations and Behaviors |
| Wireless Troubleshooting and Performance Analysis | - Identifying WLAN Performance Issues - Throughput and Latency Analysis - Common WLAN Failure Scenarios |
>> CWAP-405 Testking Exam Questions <<
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NEW QUESTION # 81
A manufacturing facility has installed a new automation system which incorporates an 802.11 wireless network. The automation system is controlled from tablet computers connected via the WLAN. However, the automation system has not gone live due to problem with the tablets connecting to the WLAN. The WLAN vendor has been onsite to perform a survey and confirmed good primary and secondary coverage across the facility. As a CWAP you are called in to perform Spectrum Analysis to identify any interference sources. From the spectrum analysis, you did not identify any interference sources but were able to correctly identify the issue. Which of the following issues did you identify from the spectrum analysis?
Answer: C
Explanation:
Spectrum analysis can reveal elevated RF energy across the band even when no distinct interference signatures are present. A persistently high noise floor reduces the signal-to-noise ratio, and if the SNR drops below a usable threshold, clients may fail to reliably detect and decode frames needed to connect and maintain service, despite a survey showing adequate coverage levels.
NEW QUESTION # 82
What is the default 802.11 authentication method for a STA when using Pre-RSNA?
Answer: B
Explanation:
The default 802.11 authentication method for a STA when using Pre-RSNA is Open System. This is the simplest and most common authentication method, which does not provide any security or encryption. In Open System authentication, the STA sends an Authentication Request frame to the AP, and the AP responds with an Authentication Response frame with a status code of success. After this, the STA can proceed to association with the AP . References: CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 181; CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 183.
NEW QUESTION # 83
Given a protocol analyzer can decrypt WPA2-PSK data packets providing the PSK and SSID are configured in the analyzer software.
When performing packet capture (in a non-FT environment) which frames are required in order for PSK frame decryption to be possible?
Answer: B
Explanation:
To decrypt WPA2-PSK data frames, the analyzer must capture the complete 4-Way Handshake because it contains the nonces and keying material used to derive the Pairwise Transient Key.
The PSK and SSID alone are insufficient; the handshake exchange is required to compute the encryption keys that protect subsequent data frames.
NEW QUESTION # 84
In what scenario is Open Authentication without encryption not allowed based on the 802.11 standard?
Answer: D
Explanation:
Open Authentication without encryption is not allowed when operating a BSS in the 6 GHz band, according to the 802.11 standard. Open Authentication is a type of authentication method that does not require any credentials or security information from a STA (station) to join a BSS (Basic Service Set). Open Authentication can be used with or without encryption, depending on the configuration of the BSS and the STA. Encryption is a technique that scrambles the data frames using an algorithm and a key to prevent unauthorized access or eavesdropping. However, in the 6 GHz band, which is a newly available frequency band for WLANs, Open Authentication without encryption is prohibited by the 802.11 standard, as it poses security and interference risks for other users and services in the band. The 6 GHz band requires all WLANs to use WPA3-Personal or WPA3-Enterprise encryption methods, which are more secure and robust than previous encryption methods such as WPA2 or WEP. The other options are not correct, as they do not describe scenarios where Open Authentication without encryption is not allowed by the 802.11 standard.
When operating a BSS in the CBRS band, which is another newly available frequency band for WLANs, Open Authentication without encryption is allowed, but not recommended, as it also poses security and interference risks for other users and services in the band. When operating a BSS in FIPS mode, which is a mode that complies with the Federal Information Processing Standards for cryptographic security, Open Authentication without encryption is allowed, but not compliant, as it does not meet the FIPS requirements for encryption algorithms and keys. When operating a BSS in a government facility, Open Authentication without encryption is allowed, but not advisable, as it may violate the government policies or regulations for wireless security. References: [Wireless Analysis Professional Study Guide CWAP-405], Chapter 8: Security Analysis, page 220-221
NEW QUESTION # 85
What does the value of the Listen Interval field in an Association Request frame indicate?
Answer: D
Explanation:
The value of the Listen Interval field in an Association Request frame indicates how often a STA in power save mode wakes up to listen to Beacon frames. The Listen Interval is expressed in units of Beacon Intervals (typically 100 TU or 102.4 ms). For example, if the Listen Interval is set to 10, it means that the STA will wake up every 10 Beacon Intervals (or about 1 second) to check for buffered frames at the AP. The Listen Interval is used by the AP to determine how long it can hold frames for a STA in power save mode before discarding them . References: CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 197; CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 198.
NEW QUESTION # 86
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