PW0-250 Online Practice Questions and Answers

One of your customers plans on providing wireless coverage to a warehouse facility. After performing an initial walkthrough, you collect the following information:

- The central part of the warehouse is between 400 and 600 feet (122 to 183 meters) from the warehouse switches mounted on the walls.

-The warehouse map was provided by the customer and is displayed in the exhibit.

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The warehouse storage is composed of metallic racks with varying inventory levels and contents, from electronics and plastic toys to food pallets and juice bottles.

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Workers need basic data coverage from their working location, and are not highly mobile. They usually work from one single aisle, and their laptop is on a cart with wheels.

What would be your recommendation to provide coverage to the central area (indicated by a blue circle) of the warehouse?

A. Equip workers laptops with a directional antenna and install APs less than 328 feet (100m) away from the switch.

B. In this case, extend the cable length just beyond 328 feet (100 m) and position APs as close as possible to the central area of the warehouse.

C. Position APs along the walls, and equip the APs with Yagi antennas to cover the central area.

D. Install APs for client access in the central area and use a mesh backhaul link to connect to the DS.

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

Given: Assume that music on hold (MOH) features are unicast only.

What VoWiFi implementations require multicast packet delivery support by the WLAN infrastructure?

A. All VoWiFi implementations

B. Push-to-Talk VoWiFi phones

C. VoWiFi soft phones

D. FMC phones

E. Flat (non-VLAN) VoWiFi implementations

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

An associated STA detects a new BSS with the same SSID as the STA's current BSS. The new BSS uses a different IP subnet than the current BSS. If the STA is configured to use 802.1X/EAP preauthentication, what is likely to occur?

A. The STA will not attempt to preauthenticate because the new BSS uses a different IP subnet.

B. The STA will attempt to preauthenticate, but fail because the new BSS uses a different data-link broadcast domain.

C. The STA will attempt to preauthenticate and succeed if DHCP is supported on the new subnet.

D. The STA will attempt to preauthenticate and succeed if IP Mobility is enabled on the AP or WLAN controller.

E. The STA will attempt to preauthenticate and succeed if the current AP has shared its cached PMK.

Assuming an identical RF environment,

which one of these scenarios is most likely to lead to a client-to-AP link imbalance in which one- way communication results?

A. Option A

B. Option B

C. Option C

D. Option D

You are testing a VoWLAN deployment, and your communication measurements show a certain amount of lost packets. What would be an acceptable packet error rate value to still provide acceptable call quality?

A. There should be 0% error in a VoWLAN type of deployment

B. No more than 1% PER max should be acceptable

C. No more than 4% PER max should be acceptable

D. No more than 8% PER max should be acceptable

E. No more than 12% PER max should be acceptable

ABC Manufacturing has a heavily-used dual-band (2.4 / 5 GHz) WLAN, but sporadic RF interference across the 2.4 GHz band is causing dropped VoWiFi calls and leading to data connectivity and throughput problems.

What steps should ABC Manufacturing take to most effectively remedy this problem?

A. Solution 1

B. Solution 2

C. Solution 3

D. Solution 4

You captured the wireless frame shown in the exhibit during a post-deployment verification site survey.

What can you tell the customer about this network?

A. This is a video stream packet, and there is a QoS marking issue on the wired side, because the DSCP value should not be set to 0.

B. This is a voice control packet, and the configuration looks normal, as voice control may or may not have a DSCP tag.

C. This is a video stream packet, and the configuration looks normal, as DSCP is always set to 0 when 802.11e QoS is specified at Layer 2.

D. This is a voice RTP packet, and its marking was downgraded from Voice to Video which is a sign of congestion issues.

As you plan a WLAN upgrade, you have assessed the network requirements and data signatures of your applications. One of the popular applications used on your network requires high bandwidth and low to medium Wi-Fi loss, but can tolerate moderate latency and jitter.

What application matches this description?

A. FTP

B. Email

C. Skype chat

D. Voice

E. Video conferencing

F. Video-on-demand