CWNP PW0-250 Online Practice Questions and Exam Preparation

CWNP PW0-250 Online Questions & Answers

• Question 1:

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

• Question 2:

  Given: For this fill-in the blank question, each answer option contains an answer for the first and second blanks, separated by a dash "--". Choose the answer option that correctly fills in both blanks in the following sentence.

  A WLAN may use 802.11 admission control to________, and admission control requirements are configured separately for each________

  A. Block stations with inadequate security parameters -- SSID
  B. Identify voice-enabled wireless devices -- AP radio (that is, 2.4 GHz or 5 GHz)
  C. Regulate the available bandwidth resources -- Access Category
  D. Mark ingress and egress frames with priority values -- TCP/IP port
  E. Administer VoWiFi use policy -- VLAN
  C. Regulate the available bandwidth resources -- Access Category

• Question 3:

  What is the purpose of DHCP Option 43, and how is it used with WLANs?

  A. It provides clients with a temporary IP address on a restricted VLAN until 802.1X authentication is completed. Then the client receives its long-term IP address.
  B. It provides IP address bindings for specific network nodes that require long-term IP address assignments. WLAN controllers are configured to use Option 43 to receive long-term IP address leases that are centrally managed with DHCP.
  C. It supports vendor-specific IP address attributes for node discovery purposes. APs use Option 43 with vendor class identifiers to obtain the IP address of a centralized WLAN controller.
  D. It integrates a DHCP server with AAA servers and user databases to dynamically assign IP addresses to client devices. During 802.1X, the AAA server uses Option 43 to notify the DHCP server what IP pool the client's address should be drawn from.
  C. It supports vendor-specific IP address attributes for node discovery purposes. APs use Option 43 with vendor class identifiers to obtain the IP address of a centralized WLAN controller.

• Question 4:

  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
  F. Video-on-demand

• Question 5:

  You are on site, planning a network at a freight shipping company on a busy harbor. Since the preliminary WLAN design specifies support for the 5 GHz spectrum, you would like to test for radar pulses to determine if DFS channels should be supported at this facility. As a part of your spectral survey with a laptop-based analyzer, you include DFS testing to identify the presence of radar. This is done by manually observing Real-time FFT, Duty Cycle, and Active Devices charts of the spectrum analyzer software.

  What potential drawback is present with this DFS test method? (Choose 3)

  A. Many WLAN products that support DFS channels report several false positives. Ideally, the actual WLAN equipment used in the deployment should be used to test for DFS.
  B. Some sources of 5 GHz radar, such as military ships, are mobile in nature. A longer, automated test setup should be used to identify the presence or absence of radar.
  C. Manual identification of radar pulses using spectrum analysis charts can be very difficult due to radar's low amplitude at the Wi-Fi receiver.
  D. Modern spectrum analyzer adapters do not provide the necessary bandwidth resolution required to detect and measure radar signatures.
  A. Many WLAN products that support DFS channels report several false positives. Ideally, the actual WLAN equipment used in the deployment should be used to test for DFS.
  B. Some sources of 5 GHz radar, such as military ships, are mobile in nature. A longer, automated test setup should be used to identify the presence or absence of radar.
  C. Manual identification of radar pulses using spectrum analysis charts can be very difficult due to radar's low amplitude at the Wi-Fi receiver.

• Question 6:

  When performing an indoor predictive site survey to make the WLAN planning and design cycle more efficient, what is a best practice for configuration of the simulated APs in the predictive modeling software?

  A. All simulated APs should be set to 20 MHz channels only.
  B. Always use the default 2.2 dBi omnidirectional antenna patterns for simulated APs.
  C. If dynamic RRM will be used, AP transmit power should be set to an estimated average level of the expected client devices, such as 25 mW.
  D. Defining custom AP and antenna patterns will yield more accurate prediction data than the pre- configured vendor AP/antenna combinations.
  C. If dynamic RRM will be used, AP transmit power should be set to an estimated average level of the expected client devices, such as 25 mW.

• Question 7:

  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
  B. Option B

• Question 8:

  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
  B. Push-to-Talk VoWiFi phones

• Question 9:

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

• Question 10:

  As an implementation engineer, you have just received initial design specs from a network designer for your dual-band 802.11n deployment. The network design documents prescribe the following data rate configuration for the 2.4 GHz radio:

  Basic Rates -- 5.5, 6, 11, 12 Mbps

  Supported Rates --9, 18, 24, 36, 48, and 54 Mbps as well as MCS 0-15 What will result from this design strategy?

  A. By disabling support for 1 and 2 Mbps while allowing 5.5 and 11 Mbps, the network will force 802.11b clients to use these higher data rates.
  B. Protection mechanisms will always be in use on this network to support 5.5 and 11 Mbps as basic rates.
  C. HR/DSSS (802.11b) stations will not be able to associate to the service set.
  D. This configuration violates the IEEE specification that defines 6, 12, and 24 Mbps as mandatory data rates for 802.11g/n.
  E. MCS 0 will represent the lowest data rate that can be used in the service set.
  C. HR/DSSS (802.11b) stations will not be able to associate to the service set.