Free CWNA-106: Certified Wireless Network Administrator Exam Questions and Answers
Certified Wireless Network Administrator is exam CWNA-106, part of the CWNP wireless certification programme. The professional exams share one format exactly: 60 multiple-choice and multiple-answer questions in 90 minutes, 70% to pass — 80% if you are certifying as an instructor — sat through CWNP remote proctoring or at a Prometric centre, in English only, and valid for three years. CWNA is the hinge of the programme: it must be passed before CWSP, CWDP or CWAP, which can then be taken in any order. CWNP versions its codes as it revises each exam, so a number here may have been superseded by a later revision of the same certification.
Looking for CWNA-106 exam dumps or ExamTopics CWNA-106 questions? These CWNA-106 practice questions cover the same ground with verified answers and explanations, a downloadable CWNA-106 PDF and a full CWNA-106 practice test, kept current as CWNP updates the exam.
Last updated: November 5, 2026
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Question #1
A company is evaluating entry-level 802.11ac client devices for a 5 GHz deployment. According to the standard, which two capabilities must be supported by every VHT station? (Choose two.)
Select 2 answers.
Correct answer: B, C
Explanation
A VHT station must support 20, 40 and 80 MHz channels in 5 GHz and MCS 0 through 7 with one spatial stream. 160 MHz (and 80+80 MHz) channels, MU-MIMO and the 256-QAM rates are optional, so a device lacking them is still compliant.
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Question #2
What is the maximum power that a powered device (PD) can draw from the Ethernet cable under the IEEE 802.3af standard?
Correct answer: A
Explanation
802.3af PSEs source up to 15.4 W, but cable loss leaves a PD with at most 12.95 W. The 15.4 W figure is the PSE output, a common mix-up. 25.5 W and 30 W are the PD and PSE figures for 802.3at.
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Question #3
Given: A client measures a signal of -62 dBm from an AP in an open field with clear line of sight at a distance of 30 meters. The AP transmit power and antennas do not change. Approximately what signal strength should the client measure at 120 meters?
Correct answer: B
Explanation
Free space path loss increases about 6 dB each time the distance doubles. Going from 30 m to 120 m is two doublings, so 12 dB of additional loss gives -62 - 12 = -74 dBm. The 3 dB rule applies to power changes, not to distance.
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Question #4
Given: A 2.4 GHz AP is being installed in a country where the regulatory limit is 100 mW (20 dBm) EIRP. The AP will use an antenna with 5 dBi gain and a cable with 1 dB loss. What is the maximum transmitter output power that complies with the limit?
Correct answer: C
Explanation
EIRP = transmitter power - cable loss + antenna gain, so 20 dBm = Tx - 1 + 5 and Tx = 16 dBm, which is about 40 mW. Ignoring the cable loss gives 15 dBm (32 mW), and subtracting it instead of adding it back gives 14 dBm (25 mW).
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Question #5
Which interframe space is used between a unicast data frame and the Ack frame that acknowledges it?
Correct answer: D
Explanation
SIFS is the shortest interframe space and is used before Ack, CTS and other frames in an ongoing exchange, so no other station can win the medium in between. DIFS is used by stations contending to start a new transmission under DCF.
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Question #6
Given: A voice WLAN design requires a minimum signal of -67 dBm and a minimum SNR of 25 dB at all locations. During a validation survey, a surveyor measures a signal of -64 dBm and a noise floor of -84 dBm in a conference room. Which statement about this location is correct?
Correct answer: C
Explanation
-64 dBm is stronger than -67 dBm, so the signal requirement is met. SNR = -64 - (-84) = 20 dB, which is below 25 dB. The fix is to lower the noise floor or raise the signal, and good RSSI alone does not satisfy the design.
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Question #7
Given: A 5 GHz AP is configured for an 80 MHz channel width. A laptop that supports only 802.11a and 802.11n associates to the AP. What is the widest channel the laptop can use to communicate with this AP?
Correct answer: B
Explanation
Channel widths of 80 MHz are defined by 802.11ac (VHT). An HT-only client supports 20 MHz and 40 MHz channels at most, so it can use the 40 MHz channel within the AP's 80 MHz channel. The AP would use 20 MHz for 802.11a frames.
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Question #8
What IETF standard protocol is used to manage and control lightweight access points from a WLAN controller?
Correct answer: B
Explanation
CAPWAP (Control and Provisioning of Wireless Access Points) is the IETF standard that lets a controller configure, manage and tunnel traffic for lightweight APs. SNMP and Syslog are monitoring tools, and RADIUS is used for authentication and accounting.
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Question #9
What is the maximum power that a Type 2 PSE can supply, as defined by the IEEE 802.3at amendment?
Correct answer: C
Explanation
802.3at Type 2 PSEs supply up to 30 W at the port. The powered device is guaranteed about 25.5 W after cable losses, which is the common trap. 15.4 W is the 802.3af limit at the PSE.
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Question #10
An AP is transmitting at 17 dBm. The administrator lowers the transmit power setting to 11 dBm. Which statement describes the change in the AP's transmit power in milliwatts?
Correct answer: D
Explanation
The change is 11 dBm minus 17 dBm, which is a 6 dB decrease. A 3 dB change halves power, so a 6 dB decrease reduces power to one-quarter (about 50 mW down to about 12.6 mW).
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Discussion
Explain your reasoning, not just the letterOther CWNP certifications
- CWDP-303: Certified Wireless Design Professional (opens in a new tab)
- CWNA-107: Certified Wireless Network Administrator (opens in a new tab)
- CWDP-302: Certified Wireless Design Professional (opens in a new tab)
- CWNA-108: Certified Wireless Network Administrator (opens in a new tab)
- PW0-071: Certified Wireless Technology Specialist - Sales (CWTS) (opens in a new tab)
- CWISA-102: Certified Wireless IoT Solutions Administrator (opens in a new tab)
- CWAP-402: Certified Wireless Analysis Professional (opens in a new tab)
- CWSP-205: Certified Wireless Security Professional (CWSP) (opens in a new tab)
- CWAP-404: Certified Wireless Analysis Professional (opens in a new tab)
- CWSP-206: CWSP Certified Wireless Security Professional (opens in a new tab)
- CWAP-403: Certified Wireless Analysis Professional (opens in a new tab)
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FAQ
Learn More: https://www.cwnp.com/it-certifications/
- Q1: What is the CWNA-106: Certified Wireless Network Administrator exam?
- A: CWNA-106: Certified Wireless Network Administrator is a CWNP certification exam. Judging by the questions in our bank, it concentrates on wlan, antenna, 802.11-2012, ieee and 802.11n.
- Q2: What topics does the CWNA-106: Certified Wireless Network Administrator exam cover?
- A: Questions in our CWNA-106: Certified Wireless Network Administrator bank cluster around wlan, antenna, 802.11-2012, ieee, 802.11n, wave, channel and signal. Working through the full set is the quickest way to find which of these you are weakest on.
- Q3: How should I prepare for CWNA-106: Certified Wireless Network Administrator?
- A: Work through the CWNA-106: Certified Wireless Network Administrator practice questions here, checking your answer on each one, then sit the practice test to rehearse the exam under timed conditions before the real thing.
- Q4: Are these real CWNA-106: Certified Wireless Network Administrator exam questions?
- A: They are drawn from officially released past questions and from community members who have sat CWNA-106: Certified Wireless Network Administrator. Answers are verified and updated weekly.
- Q5: Where do I register for the CWNA-106: Certified Wireless Network Administrator exam?
- A: Register through CWNP directly. Exampractice is not affiliated with CWNP and does not administer the exam.
- Q6: Is there a free CWNA-106: Certified Wireless Network Administrator sample?
- A: Yes. Every CWNA-106: Certified Wireless Network Administrator page shows a free sample of real questions. Upgrading opens the full bank and the practice test.
- Q7: What are CWNP Certification Exams?
- A: CWNP (Certified Wireless Network Professional) Certification Exams validate your expertise in wireless networking technologies, covering areas such as WLAN design, security, analysis, and troubleshooting. These certifications demonstrate your proficiency in managing and optimizing wireless networks.
- Q8: Why should I pursue CWNP Certification?
- A: CWNP Certification enhances your professional credibility, showcasing your skills and knowledge in wireless networking. This can lead to better job opportunities, higher salaries, and career advancement in the networking and IT industries, especially in roles focused on wireless technologies.
- Q9: What are the benefits of CWNP Certification?
- A: Benefits include recognition as a certified wireless networking professional, improved job performance, access to exclusive resources, continuing education opportunities, and staying current with the latest wireless networking technologies and best practices.
- Q10: Who should take CWNP Certification Exams?
- A: Network engineers, IT professionals, system administrators, wireless network designers, and anyone involved in designing, implementing, and managing wireless networks should consider these certifications to validate their expertise and advance their careers.
- Q11: What types of CWNP Certification Exams are available?
- A: CWNP offers various certification paths, including:
- Q12: How do I prepare for CWNP Certification Exams?
- A: Preparation can include official CWNP training courses, study guides, practice exams, online tutorials, and hands-on experience with wireless networking technologies.
- Q13: Where can I take CWNP Certification Exams?
- A: CWNP Certification Exams can be taken at authorized Pearson VUE testing centers worldwide or online, providing flexibility to fit your schedule and location.
- Q14: How do CWNP Certifications impact my career?
- A: CWNP Certifications significantly boost your career by demonstrating your expertise to employers, making you a more competitive candidate for advanced roles and promotions in wireless networking and IT.
- Q15: Are there any prerequisites for CWNP Certification Exams?
- A: Some exams may have prerequisites, such as foundational knowledge or prior certifications. Check the specific requirements for each certification path on the CWNP website.
- Q16: How often do I need to recertify for CWNP Certifications?
- A: CWNP Certifications typically require recertification every three years to ensure that certified professionals stay updated with the latest wireless networking technologies and industry practices.