Free CWNP PW0-250 Exam Dumps Questions & Answers

Given: You are evaluating the theoretical and real-world RF gain benefits of transmit and receive features introduced by 802.11n with MIMO. This exercise allows you to quantify the feature's value in a real-world environment.
What is the maximum theoretical signal gain of chip-based TxBF and MRC (as features) when compared to the same AP using only a single antenna for transmit and receive (effectively simulating a 1x1 chip)?

• A.  The theoretical gains offered by each additional radio are different for TxBF and MRC.
• B.  2 Rx or Tx chains = approx 4-6.5 dBi gain 3 Rx or Tx chains = approx 7-10 dBi gain 4 Rx or Tx chains = approx 10-12 dBi gain
• C.  2 Rx or Tx chains = 1 dBi gain 3 Rx or Tx chains = 2 dBi gain 4 Rx or Tx chains = 3 dBi gain
• D.  2 Rx or Tx chains = 3 dBi gain 3 Rx or Tx chains = approx 5 dBi gain 4 Rx or Tx chains = 6 dBi gain
• E.  2 Rx or Tx chains = 3 dBi gain 3 Rx or Tx chains = 6 dBi gain 4 Rx or Tx chains = 9 dBi gain

In a large enterprise (5000+ wireless users), by what recommended methods are IP addresses and VLANs assigned to different clients associated to the same AP? (Choose 3)

• A.  Each BSSID is assigned a unique VLAN to help manage the size of broadcast domains on the wired network
• B.  Radio signal metrics (RSSI, SNR, etc.) of WLAN clients are triangulated for location-based VLAN assignment during association
• C.  The configuration profile of the client supplicant is hard-coded with a VLAN ID.
• D.  In a centralized data forwarding model, clients automatically receive an IP address on the native VLAN of the AP's Ethernet access port.
• E.  Multiple VLAN pools are designated for an SSID and user IP addresses are selected in a round-robin fashion from the associated pools.
• F.  Upstream AAA servers dynamically assign VLANs to each user or group profile
• G.  Each SSID is mapped to a static VLAN assignment

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.  No more than 8% PER max should be acceptable
• B.  No more than 12% PER max should be acceptable
• C.  No more than 4% PER max should be acceptable
• D.  No more than 1% PER max should be acceptable
• E.  There should be 0% error in a VoWLAN type of deployment

After surveying for the ideal mounting locations for APs, you have been asked to compromise RF propagation optimization due to aesthetic concerns raised by your customer. In the end, you've decided to mount the APs in the ideal locations and paint the APs so they go unnoticed in the environment.
What is a valid recommendation or consideration when painting APs? (Choose 2)

• A.  Most AP models for indoor environments come in a variety of form factors and colors. Painting is never recommended.
• B.  Always use paints with metallic dye in them to prevent potential RF propagation impact.
• C.  Painting APs always introduces a fire and gas emissions hazard and should be avoided for all indoor APs.
• D.  Painting APs may void the product manufacturer's warranty.
• E.  Do not paint the notification LEDs on the AP, but configure them to be dim or turned off altogether until troubleshooting is required.

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 802.11n. In your research, you have discovered that your new wireless client devices and infrastructure are 802.11n, 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?

• A.  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 PS-Poll frames.
• B.  WMM-PS enabled APs will allow both WMM-PS and non-WMM-PS stations to use the trigger-and-delivery mechanism, but WMM-PS stations will get priority.
• C.  Performance and battery life will be inconsistent between WMM-PS and non-WMM-PS client devices when used with applications that support WMM-PS.
• D.  When all STAs are using Power Save features, WMM-PS STAs will experience poor performance due to PS protection mechanisms.
• E.  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.