CWNP CWDP Certifications PW0-250 Questions & Answers

• Question 41:

  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.

  Correct Answer: B

• Question 42:

  Given: A WLAN controller is connected to ABC Company's core layer 3 Ethernet switch with an IEEE 802.1Q trunk connection. The WLAN controller's native VLAN is VLAN 6 and its IP address is 10.0.14.2 /24. Lightweight APs supporting centralized forwarding are connected to the network on VLANs 7, 8, and 9, and they each build a layer 3 tunnel back to the WLAN controller's IP address. The dynamically assigned IP addresses received by each AP from a DHCP server will be .

  A. Associated with the VLAN on which they are connected.

  B. Associated with the native VLAN of the WLAN controller.

  C. Associated with VLAN 1, the default VLAN for new APs

  D. Associated with a non-routable VLAN until the MAC address of the AP is removed from the controller's MAC filter

  Correct Answer: A

• Question 43:

  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

  Correct Answer: C

• Question 44:

  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 SSID is mapped to a static VLAN assignment

  B. Upstream AAA servers dynamically assign VLANs to each user or group profile

  C. Radio signal metrics (RSSI, SNR, etc.) of WLAN clients are triangulated for location-based VLAN assignment during association

  D. Each BSSID is assigned a unique VLAN to help manage the size of broadcast domains on the wired network

  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. In a centralized data forwarding model, clients automatically receive an IP address on the native VLAN of the AP's Ethernet access port.

  G. The configuration profile of the client supplicant is hard-coded with a VLAN ID.

  Correct Answer: ABE

• Question 45:

  You are tasked with designing the WLAN to accommodate certain high density areas on your university campus where users are highly transient (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 associations. The DHCP server is a Windows Server 2008 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

  E. Enable WLAN Controller DHCP relay

  F. Enable mandatory admission control

  G. Set the AES rekey interval to 5 minutes

  H. Set the 802.1X re-authentication timer to 10 minutes

  Correct Answer: D

• Question 46:

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

  A. AF31

  B. CS3

  C. VO

  D. EF

  E. AF12

  Correct Answer: D

• Question 47:

  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

  Correct Answer: C

• Question 48:

  Given: Use the exhibit as a reference. ABC Company has a WLAN controller with 10 controller- based APs; the Voice SSID is configured for centralized data forwarding. Each AP is connected to an access port on a layer-2 Ethernet switch. Each layer-2 switch is uplinked to a single layer-3 core Ethernet switch. The WLAN controller is connected directly to the layer-3 core Ethernet switch. Layer-3 tunnels are created between all controller-based APs and the WLAN controller. A voice server is connected to the layer-3 Ethernet switch.

  

  When a voice-enabled QoS STA sends an IP data packet to a voice server in this scenario, the DSCP value carried in the STA's IP data packet gets mapped to what and by which device?

  A. The DSCP value is mapped to an IEEE 802.1Q priority tag value by the WLAN controller.

  B. The DSCP value is mapped to the DSCP value in the encapsulating IP header by the layer-3 switch.

  C. The DSCP value is mapped to an IEEE 802.1p (802.1D-2004) UP value by the access point.

  D. The DSCP value is mapped to an IEEE 802.1Q VLAN tag by the access point.

  E. The DSCP value is mapped to the VLAN ID by the layer-2 Ethernet switch.

  Correct Answer: A

• Question 49:

  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

  Correct Answer: B

• Question 50:

  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. Voice

  B. Email

  C. Skype chat

  D. Video-on-demand

  E. Video conferencing

  F. FTP

  Correct Answer: D