CWDP-304 Online Practice Questions and Answers

In a convention center, you have received complaints about the WLAN infrastructure. At this moment, the are only two APs in one auditorium. After analyzing the situation, you determined that there are more client devices that the infrastructure was designed for. There are only two APs to support more than 300 devices using the Wi-Fi at the same time. What should you do to make the Wi-Fi work as expected?

A. Redesign the entire WLAN

B. Quickly add more APs

C. Upgrade the Ethernet connections to MultiGig

D. Turn up the output power on the APs so that they can handle more clients

You told your customer that multipath fading may be mitigated simply by moving one or both of the receivers antennas a small amount, usually by one to four wavelengths away from its original position. Your customer is prepared to make the change, but does not know the wavelength for 802.11ac.

What is the approximate wavelength of an 802.11ac radio wave?

A. 5.5 cm (2.16 inches)

B. 12 cm (4.72 inches)

C. 15.24 cm (6 inches)

D. 45 cm (17.71 inches)

In a PC-based spectrum analyzer, what data chart identifies the overall RF utilization of a specific frequency in the environment being surveyed?

A. FFT Max Hold

B. FFT Average

C. Swept Spectrogram

D. Duty cycle

What are some common problems with short (12 or fewer characters) ASCII passphrases in WPA/WPA2-Personal networks?

Response: A. They are more susceptible to dictionary attacks than longer passphrases.

B. They lead to weak group keys in a BSS.

C. They only produce a 64-bit PMK instead of a 256-bit PMK.

D. Very few AP and client vendors support entry of an ASCII-based passphrase.

In your company's WLAN, you expect to have a mixed client PHY environment and plan to use protection mechanisms. The protection mechanism used by your client devices is configurable.

What is the best protection mechanism for backward compatibility of 802.11n devices with 802.11b devices?

Response:

A. WMM Protection

B. SMPS

C. CTS-to-Self

D. Dual-CTS

E. RTS/CTS

What is a valid 40 MHz channel configuration in the 2.4 GHz ISM band where channels 1- 11 are permitted?

A. 4 (primary), +1 (secondary)

B. 2 (primary), -1 (secondary)

C. 8 (primary), +1 (secondary)

D. 1 (primary), 6 (secondary)

You are creating an outdoor bridge link that spans more than 1000 yards. Which one of the following antenna types is more likely to be included in the design?

A. Yagi

B. Omni

C. Patch

D. Panel

What differences exist between VLANs in wireless and wired domains?

Response:

A. Wireless VLANs are not effective for segmenting the available services and network permissions available to clients. Wired VLANs are effective for this purpose.

B. Wireless VLANs are never carried in 802.11 frames that cross the wireless medium. VLAN identifiers are always carried in Ethernet frames to indicate the proper VLAN.

C. Wireless VLANs do not always segment traffic into separate broadcast domains on the wireless medium. Wired VLANs do segment broadcast domains on the wired network.

D. Wireless VLANs are ineffective for utilizing a single set of infrastructure equipment to provide different services to different client groups. Wired VLANs are effective for this purpose.

You are tasked with designing the WLAN to accommodate certain high density areas on your university campus where users frequently come and go. With a limited DHCP pool size (subnet mask = 255.255.252.0) for this WLAN subnet, you want to ensure that your DHCP addresses are used efficiently and are not exhausted, which would prevent new client Layer 3 connections. The DHCP server is a Windows Server 2012 R2 machine. Your design task is to determine the best configuration to allow as many users as possible while avoiding WLAN service interruptions and also to use the available addresses as efficiently as possible.

What setting would be most effective at achieving this design task?

A. Set the RTS threshold to 2346 bytes

B. Set the inactive wireless client timeout (client age-out) to 5 minutes

C. Set the maximum client limit per radio to 64

D. Set the DHCP lease for this pool to 20 minutes

Given: As the wireless network administrator for XYZ Company, you are planning to upgrade your aging wireless network infrastructure, as well as some clients, to support 802.11ac.

In your research, you have discovered that your new wireless client devices and infrastructure are 802.11ac, WMM, and WMM-PS certified by the Wi-Fi Alliance. Some of your existing client devices are 802.11a/b/g devices that do not

support WMM.

Given this information, what scenario is possible when your company's employees begin using both types of client devices on the new WLAN?

Response:

A. All WMM-PS certified client devices will be prevented from utilizing WMM-PS features until all stations in use on the wireless medium are WMM-PS certified.

B. Performance and battery life will be inconsistent between WMM-PS and non-WMM-PS client devices when used with applications that support WMM-PS.

C. The WLAN infrastructure will set the dozing times of the WMM-PS certified client devices based upon their WMM access category, while the non-WMM-PS client devices will continue to use PSPoll frames.

D. WMM-PS enabled APs will allow both WMM-PS and non-WMM-PS stations to use the triggerand- delivery mechanism, but WMM-PS stations will g