Free CWNA-107 Exam Braindumps

When an ACK frame is not received by the transmitting STA, what is assumed?

1. A. The frame was correctly delivered
2. B. The frame was not delivered and must be retransmitted
3. C. The receiver is offline
4. D. The receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled

Correct Answer: B

When using a spectrum analyzer 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 user’s workspace, but the interference disappears quickly after just 2 meters. What is the most likely cause of this interference?

1. A. USB 3 device in the user’s work area
2. B. Bluetooth devices in the user’s work area
3. C. Excess RF energy from a nearby AP
4. D. Unintentional radiation from the PC power supply

Correct Answer: D
Reference https://www.reddit.com/r/electronics/comments/2i2s76/is_the_emf_of_a_pc_without_a_case_much_higher/?st=

Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?

1. A. VHT (802.11ac)
2. B. OFDM (802.11a)
3. C. DSSS (802.11-Prime)
4. D. HT (802.11n)

Correct Answer: D

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?

1. A. WPAN
2. B. Ad-hoc
3. C. BSS
4. D. IBSS

Correct Answer: C

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?

1. A. USB 3 devices in the user’s work area
2. B. Bluetooth devices in the user’s work area
3. C. Excess RF energy from a nearby AP
4. D. Unintentional radiation from the PC power supply

Correct Answer: D
https://www.reddit.com/r/electronics/comments/2i2s76/is_the_emf_of_a_pc_without_a_case_much_higher/?st=