CWDP Practice Test

CWDP Exam at a Glance

What changed for CWDP in 2026

• Oct 25, 2026: Exam fee (CWDP-305) changed to $349.99 (USD) (previously $349.99 (USD) exam voucher).^[1]
• Oct 25, 2026: Renewal changed to Hold current CWNA + pass current CWDP exam (previously Hold current CWNA + pass current CWDP exam (also renews CWNA 3 years)).^[1]
• Oct 25, 2026: Score release changed to CWNP receives results in 24–72 hours (previously Score report at exam; CWNP receives results in 24–72 hours).^[2]

What the CWDP is and how it works

According to CWNP, “you must hold a current and valid CWNA credential.”^[1]

CWDP (Certified Wireless Design Professional) is a CWNP certification for people who plan and design wireless LANs. The current exam is CWDP-305. It has 60 multiple-choice questions and a time limit of 90 minutes. CWNP lists the fee as $349.99 (USD).

You can take the exam as a CWNP remote proctored exam or at a Prometric test center. CWNP offers remote proctoring for CWDP along with several of its other exams.

Eligibility is strict. You must hold a current and valid CWNA credential before the CWDP credential can be awarded.

After you sit the exam, CWNP asks you to allow a minimum of 24 to 72 hours for it to receive your results. It then sends a confirmation email. If you do not pass, there is a 10-day waiting period before you can retake the exam, and weekends count toward those days.

The CWDP certification is valid for 3 years. To recertify, you need a current CWNA credential and you must pass the current CWDP exam.

This page does not state a passing score or a list of official exam objectives, because we have not verified them. Check the CWDP page on cwnp.com for the current objectives, scoring details and any change to the fee or format before you book.

Worked examples: how to reason through CWDP questions

These are practice questions written for this site, not questions from the real exam. Each explanation shows why the right answer is right and why the others are wrong.

Example 1

Question: What minimum RSSI delta between the current AP and a candidate AP typically triggers a client roam decision?

1. 2 dB
2. 5 dB
3. 12 dB
4. 20 dB

Answer: B. 5 dB

Explanation:

The correct answer is 5 dB. Many clients wait until a candidate AP is clearly stronger than the current one before they roam. That margin stops a client from switching back and forth when two APs have similar signal levels.

2 dB is wrong because normal signal fluctuation is larger than that, so a client using it would roam constantly. 12 dB and 20 dB are wrong because they are too high. A client would hold on to a weak AP long after a better one was available, and users would see poor performance.

The rule to remember is that roaming thresholds are a compromise between stability and responsiveness. Client behaviour differs by vendor and driver, so a design should give overlapping coverage with a clear signal difference between neighbouring APs rather than rely on one exact trigger value.

Example 2

Question: How should channel planning be approached in a multi-floor building to minimize co-channel interference?

1. Use a 3D channel reuse pattern ensuring the same channel is not used on adjacent APs vertically or horizontally
2. Use the same channel on every floor for consistency
3. Only use channel 1 throughout the building
4. Assign channels randomly to each AP

Answer: A. Use a 3D channel reuse pattern ensuring the same channel is not used on adjacent APs vertically or horizontally

Explanation:

The correct answer is a 3D channel reuse pattern. Radio signals pass through floors and ceilings as well as walls, so an AP on one floor can interfere with APs above and below it, not only with its neighbours on the same floor.

Using the same channel on every floor is wrong because it stacks co-channel APs directly on top of each other and they compete for airtime. Using only channel 1 is wrong because every AP ends up sharing a single channel. Random assignment is wrong because it gives no control over which APs end up as neighbours, so conflicts appear by chance.

The rule to remember is that channel planning is a spatial problem in three dimensions. Check the neighbours of each AP in every direction, and use floor attenuation as part of the separation between APs that share a channel.

Example 3

Question: Which environmental factor causes the most significant signal attenuation for outdoor 5 GHz links during adverse weather?

1. Direct sunlight on antennas
2. Heavy rain causing rain fade above 10 GHz
3. Wind causing antenna misalignment
4. High humidity at ground level

Answer: C. Wind causing antenna misalignment

Explanation:

The marked answer is wind causing antenna misalignment. High-gain directional antennas have narrow beams, so a small movement of a mast or mount can point the beam away from the far end and cut the received signal sharply.

Direct sunlight is wrong because it does not meaningfully weaken an RF signal, although heat can matter for equipment. Heavy rain causing rain fade above 10 GHz is wrong for this question because the link in the question runs at 5 GHz, below the frequencies where rain fade becomes the main concern. High humidity at ground level is wrong because it has little effect on a link at this frequency.

The rule to remember is to match the impairment to the frequency band in the question. For a narrow-beam link at 5 GHz, mechanical stability of the mount is the practical risk to check first.

How to use these practice tests

Start with the CWDP page on cwnp.com and read the current exam objectives. Write down each topic in your own words and mark the ones where you could not explain the reasoning to a colleague. Your CWNA material is also useful here, since the CWDP exam builds on it.

Then use the practice sets to find gaps. Begin with the foundations: RF Fundamentals and Wireless Technologies and Wireless Network Design and Architecture. Move on to design-specific topics such as Channel Planning and RF Design, Antenna Design and Placement and Capacity Planning and High-Density Design.

After each set, read the explanation for every question you missed, then go back to the official material and find the section that covers it. Do not just memorise the answer. Work out why the other options fail.

Finish with Wireless Network Troubleshooting and mixed review of your weakest sets, timed so you get used to the 90-minute limit and 60 questions. Our questions are written by us and are not real exam questions, so use them to test understanding rather than to predict what will appear.

Sources & last verified

1. CWNP — number of questions, time limit, exam fee, validity (official source). “Questions: 60 multiple choice” Verified Oct 25, 2026 · source checked Oct 24, 2026.
2. CWNP — retake policy, delivery, score release (official source). “For all other certification exams, there is a 10-day waiting period to retake an exam.” Verified Oct 25, 2026 · source checked Oct 24, 2026.

How we verify: editorial & fact-checking policy. Report an error: contact us.