CWNA Regulatory Frameworks & Compliance 3 — Questions and Answers
Question 1: Under FCC rules, what is the maximum conducted output power for a client device (STA) operating in the 2.4 GHz band?
- 1 W (30 dBm) (Correct answer)
- 100 mW (20 dBm)
- 500 mW (27 dBm)
- 4 W (36 dBm)
Correct answer: 1 W (30 dBm)
FCC Part 15.247 allows up to 1 W (30 dBm) conducted output power for 2.4 GHz spread-spectrum devices.
Question 2: What is the antenna gain rule for 2.4 GHz point-to-multipoint systems under FCC Part 15?
- For every 1 dBi gain above 6 dBi, reduce conducted power by 1 dB (Correct answer)
- For every 3 dBi gain above 6 dBi, reduce conducted power by 1 dB
- Antenna gain is unrestricted as long as EIRP is below 4 W
- Conducted power must be reduced 3 dB for any directional antenna used
Correct answer: For every 1 dBi gain above 6 dBi, reduce conducted power by 1 dB
FCC Part 15.247 requires a 1 dB reduction in conducted power for each 1 dBi of antenna gain above 6 dBi for point-to-multipoint links.
Question 3: Which organization maintains the IEEE 802.11 standard and its amendments?
- IEEE (Correct answer)
- Wi-Fi Alliance
- IETF
- ITU
Correct answer: IEEE
The IEEE 802.11 Working Group develops and maintains all 802.11 amendments such as 802.11ax and 802.11be.
Question 4: A vendor's Wi-Fi device displays a 'CE' mark. What does this signify?
- The device conforms to EU directives and can be sold in the European Economic Area (Correct answer)
- The device has been certified by the FCC for use in the US
- The device meets Chinese Electronics safety standards
- The device is certified by ETSI for technical accuracy
Correct answer: The device conforms to EU directives and can be sold in the European Economic Area
The CE mark is the manufacturer's declaration that the product complies with all applicable EU directives, enabling market access in the EEA.
Question 5: Which FCC enforcement action can result from operating a Wi-Fi device that causes harmful interference?
- Notice of Apparent Liability (NAL) for forfeiture (Correct answer)
- Automatic revocation of all FCC licenses held
- Criminal prosecution under Part 15 statutes
- Mandatory recall of all devices of the same model
Correct answer: Notice of Apparent Liability (NAL) for forfeiture
The FCC may issue a Notice of Apparent Liability (NAL) proposing a monetary forfeiture as the primary enforcement mechanism for Part 15 violations.
Question 6: What is the FCC's definition of 'harmful interference'?
- Interference that seriously degrades, obstructs, or repeatedly interrupts a radiocommunication service (Correct answer)
- Any signal that causes packet loss greater than 10% on a licensed network
- Interference that affects more than one licensed service simultaneously
- Any unlicensed transmission that overlaps a licensed frequency
Correct answer: Interference that seriously degrades, obstructs, or repeatedly interrupts a radiocommunication service
The FCC defines harmful interference as any emission that seriously degrades, obstructs, or repeatedly interrupts a radiocommunication service.
Question 7: Which ITU region includes the United States, Canada, and Latin America for spectrum allocation purposes?
- Region 2 (Correct answer)
- Region 1
- Region 3
- Region A
Correct answer: Region 2
ITU Region 2 encompasses the Americas, where the FCC and ISED Canada align spectrum allocations with ITU Radio Regulations.
CWNA Regulatory Frameworks & Compliance 3
Under FCC rules, what is the maximum conducted output power for a client device (STA) operating in the 2.4 GHz band?