CWDP (Wi-Fi Design) CWDP-303 Study Guide

1. When designing a WLAN to support voice in a large office, which design element is of the highest concern for performance?

2. What is the minimum PoE budget needed on a switch to support 6 (six) APs that can only be powered using IEEE 802.3at if no other details are provided?

3. In high-density environments, such as stadiums and convention centers, what extra factor has to be taken into account that can attenuate Wi-Fi signals when these environments are having an event?

4. What document is typically created to launch a project?

5. Your new customer is concerned about maintaining privacy for their proprietary information when you conduct information gathering for their WLAN design.

Which document can you use to directly address their concern?

6. What metric implements the simplest algorithm and lowest accuracy in networks requiring locations?

7. Your customer is using PSK as their only authentication. They have an industry requirement to move to a stronger solution. Your recommendation is to move to a certificate-based type of authentication where both the client and server require certificates.

Which EAP type would be the best fit?

8. A company wants to connect its headquarters to its remote office that is 13 kilometers away using a wireless bridge.

What requirement must not be forgotten by their Wireless Engineer when considering the Fresnel Zone?

9. You are conducting a physical site survey where heavy machinery is repaired.

What is a common item required specifically for this type of survey?

10. A business traveler from North America is in Europe. The hotel only provides coverage in 2.4 GHz. The traveler connects to the hotel’s SSID and notices an AP in the hotel room.

However, the laptop reports a very low RSSI when connected. The traveler does not have the same problem when connecting in the lobby.

What would be the most likely cause of the low RSSI in the hotel room?

11. A museum wants to offer Wi-Fi to its visitors. One of their requirements is to have the APs blend into the design of the museum.

What should you do to meet this requirement?

12. An engineering firm just upgraded their WLAN form nine 802.11n APS to nine 802.11ac APs. After this upgrade, they did not see any improvement in throughput.

What is the most likely cause of this result?

13. You and 10 other people are connected to a public hotspot. You issue a ping sweep on the network, but you can’t find any devices on the same subnet as yours.

What feature might be enabled on the WLAN infrastructure that is preventing you from communicating with other devices on that subnet?

14. During an RFP analysis, one of the vendors mentioned that you’ll need to upgrade your Gigabit Ethernet switches to MultiGig switches to ensure support for 802.11ac and 802.11ax, which both offer data rates over 1Gbps.

Why is this not sound advice?

15. A customer is acquiring a new VoWLAN system to replace their existing wired phone system. When reading about his system’s requirements, you learned that is requires 25 db of SNR to work as expected. After surveying the environment, you discovered that the noise floor is -88 dBm.

What should be the minimum RSSI value to meet the system’s requirements?

16. You’re about to deploy an Enterprise-class VoWLAN infrastructure. You need to ensure that QoS is properly configured throughout the network.

What Access Category (AC) should voice frames/packets use?

17. After importing a floor plan to a predictive design tool, what should be done prior to adding APs, antennas and attenuators (e.g., walls)?

18. Your customer’s 802.11n laptops are not able to see the SSID in the 5 GHz band in the conference room. When doing a walkthrough using one of these laptops, you confirm that it is unable to see the SSID in the 5 GHz band in the conference room. When using your own 802.11 ac laptop, you’re able to see the SSID.

What is the most likely cause of this problem?

19. When designing a static channel plan for an office using voice devices near an airport, which range of channels should be avoided to ensure optimal performance when implemented?

20. What is the most suitable antenna option to be used when designing a WLAN infrastructure with APs mounted on a ceiling with a height of more than 20 feet and having all of the client stations used from the floor?

21. When using a predictive design tool, you have selected APs with an antenna gain 3 dBi and set the transmit power of the predicted APs to 25 mW.

What should be EIRP of the APs in the design?

22. Switches and APs have already been chosen by your customer. All switches support 802.3bz MultiGig interfaces and APs are 4x4:4 802.11ac wave 2 capable of using dual-5GHz and have one MultiGig interface. Some cable drops for the APs will run for more than 180.5 feet (or 55 meters).

To support MultiGig, what is the best choice of cabling?

23. When surveying an existing WLAN infrastructure for a possible redesign, you use two Wi-Fi USB adapters to collect RSSI data and two USB spectrum analysis adapters to collect RF spectrum data. Since your laptop doesn’t have enough USB ports, you use a 4-port powered USB 3.0 hub.

What issues could be caused by the use of USB 3.0 that will impact your site survey?

24. What is the most cost-effective way to accurately measure the height of a ceiling when ladder use is not allowed?