10 free, exam-style Certified Wireless Network Administrator (CWNA) practice questions with answers and explanations. No signup required. Work through them below, then take the full free CWNA practice test to study every exam domain.
The CWNA exam has 60 questions and runs 1 hour 30 minutes.
These 10 free CWNA questions are organized by exam domain, so you can see how each part of the Certified Wireless Network Administrator blueprint is tested. Reveal the answer and explanation under each question.
An access point radio is configured to transmit at 18 dBm. The RF cable and connectors between the radio and the antenna introduce 3 dB of loss, and the connected antenna provides 5 dBi of gain. What is the EIRP of this system?
Correct answer: C - 20 dBm
A point-to-point bridge link passes over a large body of water on a hot day. The signal arriving at the far end appears to bend away from the straight-line path as it travels through air layers of differing temperature and density. Which RF behavior BEST describes this effect?
Correct answer: B - Refraction
A network designer wants every client on a particular SSID to operate exclusively in the 5 GHz band, with no possibility of 2.4 GHz operation at the PHY layer. Which 802.11 amendment operates ONLY in the 5 GHz band?
Correct answer: D - 802.11ac
An access point is operating on a 5 GHz channel within a UNII band that requires Dynamic Frequency Selection (DFS). During operation, the AP detects a radar signal on its current channel. To remain compliant with regulatory requirements, what must the AP do?
Correct answer: A - Vacate the channel and move to a different channel
A wireless administrator is examining a frame capture and sees a value that uniquely identifies a single Basic Service Set (BSS). In an infrastructure WLAN, what does the BSSID represent?
Correct answer: C - The MAC address of the access point's radio
After a station successfully receives a unicast data frame, it must acknowledge that frame as quickly as possible, ahead of any other station attempting to contend for the medium. Which interframe space precedes the transmission of an 802.11 ACK frame?
Correct answer: B - SIFS
A multi-radio 802.11ax access point requires more power than a legacy switch port can supply under the original PoE standard. The network team needs a standard that delivers 30 watts at the power sourcing equipment (PSE). Which IEEE standard meets this requirement?
Correct answer: B - 802.3at
An organization upgrades its guest-free, passphrase-based WLAN from WPA2-Personal to WPA3-Personal, which uses Simultaneous Authentication of Equals (SAE). Compared with the WPA2 Pre-Shared Key method, what is the PRIMARY security advantage that SAE provides?
Correct answer: C - It resists offline dictionary attacks on the passphrase
In a large office, six access points are all configured on 2.4 GHz channel 6 with overlapping coverage. Clients can connect, but aggregate throughput drops sharply during busy periods because the APs and their clients must repeatedly wait for the medium to become idle before transmitting. Which condition BEST explains this performance loss?
Correct answer: A - Co-channel contention
Users near a hospital break room report that the 2.4 GHz WLAN slows dramatically whenever the microwave oven is running, yet a frame capture shows no unusual 802.11 traffic during the slowdowns. Which tool is REQUIRED to confirm the non-Wi-Fi energy source?
Correct answer: D - Spectrum analyzer
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