PW0-250 Online Practice Questions and Answers

Your customer location is equipped with DAS, originally deployed to relay a GSM signal indoors and provide 802.11 data coverage to static stations. What type of wireless application would be least likely to be supported by this RF distribution model?

A. On-demand video streaming over wireless

B. Data connection with frequent roaming

C. Location-based services for wireless assets or RFID tags

D. VoWLAN if the codec is G.729.

E. FTP over implicit TLS/SSL

Multicast video applications typically require special treatment on the Wi-Fi network due to the nature of multicast traffic. Many vendors implement proprietary multicast-to-unicast conversion for this reason.

Which of the following is NOT a valid reason for special unicast conversion of downlink multicast traffic?

A. In QoS WLANs, multicast traffic is always assigned to the best effort (AC_BE) transmit queue.

B. Group addressed downlink frames are not acknowledged on the wireless medium.

C. Multicast traffic must always be transmitted via omnidirectional antennas.

D. Frames with a group receiver address must always be sent at a rate in the Basic Rate Set.

You are working on a VoWLAN design with your customer's wired networking team. How many distinct priority levels do you expect for the voice applications?

A. 1 priority level, but 2 queues (one for uplink traffic, one for downlink traffic)

B. 1 priority level per client and AP pair, so the total number depends on the expected number of clients

C. 1 priority level for voice RTP, 1 priority level for voice control and RTCP

D. 1 priority level for VoWLAN client traffic, 1 priority level for wired VoIP client traffic

In a multiple channel architecture (MCA) network supporting 802.1X authentication, what aspects of WLAN design affect client roaming efficiency and effectiveness? (Choose 3)

A. Channels supported by infrastructure

B. Key caching protocols

C. Cipher suite

D. PHY standard used by client

E. Supported uplink and downlink MCS rates

F. The infrastructure's roaming algorithm

G. Channels supported and scanned by client

What RF math formula should be used to convert an RF value in units of dBm into a value of mW?

*NotE. "dBm" in the formulas represents the known dBm value

A. mW 10(dBm/10)

B. mW

C. mW

D. mW

E. mW

F. mW =

Assume that your network operates in a regulatory domain that allows use of UNII-1, UNII-2, UNII- 2e, UNII-3, and the 5.8 GHz ISM band for indoor Wi-Fi. In your upcoming 802.11n deployment, you would like to take advantage of the performance improvements that result from channel bonding. However, after extensive testing, you have determined that your mission-critical WLAN should not use channels requiring DFS support.

Given those two criteria (enable channel bonding and disable DFS channels), in the 5 GHz spectrum, how many non-overlapping channels will your system be able to use?

A. 2

B. 3

C. 4

D. 6

E. 11

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

E. Sweep Time

F. Bandwidth resolution

Given: In a site survey deliverable report, you are expected to explain the spectrum measurements taken at the customer's site. The exhibit shows a representative sample capture of the RF environment at one of the customer sites.

What best explains the data presented in this exhibit?

A. The Real Time FFT chart shows a high noise floor across the entire 2.4 GHz band.

B. Channel 1 is being heavily utilized by Wi-Fi and channel 11 also has some moderate Wi-Fi activity.

C. As indicated by the data in the Active Devices list, the spectrum analysis chipset is also reporting 802.11 information.

D. Although some access points are present in a nearby area, they are not being heavily used.

At a university, the WLAN has been successfully deployed for ubiquitous access for faculty, students, and guests. Many student computer labs are available throughout the campus with wired network connectivity, but there are also a few smaller lab areas and workstations where Ethernet cabling is not available. For student wireless use, the students must authenticate against RADIUS/Active Directory using PEAP. Also, the network administrators at this university would like administrative access to these workstations when they are not in use by students so that the administrators can manage group policies, update OS patches, and perform other routine software maintenance.

What deployment options are available and recommended for both student use and remote administration of these workstations? (Choose 2)

A. Due to the architecture of 802.1X port-based access control, it is not possible for a wireless- only computer to access network services required by network administrators in this scenario.

B. Machine authentication accounts should be enabled to provide persistent machine network connectivity when student users are not associated.

C. The WLAN infrastructure vendor is responsible for providing proprietary client connectivity options to facilitate device connectivity without user interaction.

D. These workstations should be Ethernet-connected to a wireless client bridge, which will maintain network connectivity independent of student connectivity status.

E. These stations should be deployed with dual WLAN adapters. One adapter would be used for consistent network connectivity for administrative purposes and the second adapter should be used for student access.

What is the DSCP Per Hop Behavior equivalent classification of the 802.11e AC_VO priority level?

A. AF31

B. EF

C. VO

D. AF12

E. CS3