Number: Passing Score: 800 Time Limit: 120 min File Version: 7.0. Cisco Questions & Answers

642-742 Number: 642-742 Passing Score: 800 Time Limit: 120 min File Version: 7.0 Cisco 642-742 Questions & Answers Implementing Cisco unified Wireless Voice Networks (IUWVN) v2.0 Version: 7.0 Cisco 642-742 Exam

Exam A QUESTION 1 Which two options allow a Cisco Unified Wireless IP Phone 7925G to conserve its battery? (Choose two.) A. PS-Poll B. S-APSD C. U-APSD D. 802.11h E. 802.11r Correct Answer: AC : QUESTION 2 Which statement describes the benefit of WMM U-APSD over legacy 802.11 power-save mode? A. Client can burst data without standard interframe spacing. B. Client can burst data without ACKs. C. Client no longer sends null frame to notify of sleep mode. D. Client sleep mode is scheduled by AP to reduce jitter. Correct Answer: A QUESTION 3 Which two items enable WMM to expedite frames from respective traffic categories? (Choose two.) Consistent CWmin and CWmax values Dynamic CWmin and CWmax values

A. AIFS B. SIFS C. PIFS D. DIFS E. U-APSD F. PS-Poll Correct Answer: BC : QUESTION 4 When a VoWLAN client is in the range of two cells, which two statements describe how the client makes a decision about which cell is the best to associate with? (Choose two.) A. The client will associate with the cell with the highest RSSI value. B. The client will associate with the cell with the lowest SNR value. C. The client will associate with the cell broadcasting the highest 802.11e value. D. The client will associate with the cell broadcasting the highest TSPEC value. E. The client will associate with the cell broadcasting the lowest mandatory date rate. F. The client will associate with the cell broadcasting the highest data rate. G. The client will associate with the first cell that advertises U-APSD. Correct Answer: AB : QUESTION 5 The AP has been properly configured for a VoWLAN survey. The RF environment contains a noise of -87 to -90 dbm. What would be the target value for the cell edge reading?

A. -55 dbm B. -60 dbm C. -62 dbm D. -67 dbm E. -70 dbm F. -73 dbm Correct Answer: C : QUESTION 6 What is the recommended minimum speed at the edge of the cells in an 802.11g network for a good Cisco VoWLAN deployment? A. 11 Mb/s B. 12 Mb/s C. 18 Mb/s D. 36 Mb/s E. 54 Mb/s Correct Answer: B :

QUESTION 7 Which three statements are true about load-based Call Admission Control? (Choose three.) A. grants a VoWLAN client-initiated call based on the number of active clients associated to the AP B. grants a VoWLAN client-initiated call based on channel bandwidth capacity C. uses the 802.11i specifications D. uses ADDTS action frames E. requires a WMM-enabled client Correct Answer: BDE QUESTION 8 Using proper VoWLAN design practice, what would be a reasonable total number of calls for a properly designed 802.11g cell to ensure call quality? A. 4 B. 7 C. 14 D. 20 E. 25 F. 27 Correct Answer: C : QUESTION 9 Using proper VoWLAN design practice, what would be a reasonable total number of calls for a properly designed 802.11a cell to ensure call quality?

A. 4 B. 7 C. 14 D. 20 E. 25 F. 27 Correct Answer: D : QUESTION 10 A VoWLAN site survey was performed and equipment installed based on recommended design guidelines. Which two statements describe reasons to perform a post-deployment survey? (Choose two.) A. There is insufficient information about the number of people in the area when the survey is performed. B. There is insufficient information by AirMagnet VoFi Analyzer. C. There are elevator shafts. D. There are roaming pathways. E. There are changes in temperature in the indoor environment. Correct Answer: AD : QUESTION 11 Which attribute does the VoWLAN Readiness Tool of WCS v7.0 use to predict acceptable conditions? A. SNR B. RSSI C. PER D. WMM

E. QBSS Correct Answer: B : QUESTION 12 You are deploying a combination of Cisco Unified Wireless IP Phones 7921G and 7925G at your branch offices in a centralized call processing environment that requires high availability at branch locations. Which three components need to be verified before the wireless IP phones can be deployed? (Choose three.) A. Sufficient SRST license support at each branch location B. Support for local voice mail C. Branch gateways support MoH D. Properly configured QoS over the IP WAN links E. Support for single number reach F. Support for E.164 dialing G. Sufficient IP phone licenses in the Cisco Unified Communications Manager cluster Correct Answer: ADG : QUESTION 13 You have recently added Cisco Unified Wireless IP Phones 7921G and 7925G to your branch office. The new wireless and wired IP phones are experiencing poor call quality when receiving calls across the IP WAN from the remote HQ. What is the most likely issue?

A. The Cisco Unified Communications Manager bandwidth for the IP WAN link is not properly configured and is allowing more calls than the link can accommodate. B. The Cisco Unified Communications Manager bandwidth settings have not been increased to support the new wireless IP phones. C. The Cisco Unified Communications Manager bandwidth is set too low, resulting in poor call quality. D. The Cisco Unified Communications Manager gatekeeper-controlled CAC has been set too low, resulting in poor call quality. Correct Answer: A : QUESTION 14 Your Cisco Unified Wireless IP Phones 7921G and 7925G are associated with the VoWLAN at your branch office. When they attempt to place a call, the call fails to go through and you receive a fast busy tone. What is the issue? A. The wireless phones failed to register with the Cisco Unified Communications Manager cluster. B. The Cisco Unified Communications Manager cluster invoked CAC to preserve IP WAN voice bandwidth. C. The local gateway rejected the call because of high IP WAN utilization. D. Automatic alternate routing has been invoked. Correct Answer: B : QUESTION 15 Which two Cisco components are required to extend an existing VoWLAN to dual-mode wireless phones? (Choose two.) A. An LDAP server for the WLAN B. Cisco Unified Mobile Communicator C. Cisco Unified Mobility Advantage client D. Cisco Unified Mobility Advantage E. Cisco Unified Communications Manager

F. A RADIUS server for the WLAN Correct Answer: BD : QUESTION 16 A web browser is opened to a new Cisco Unified Wireless IP Phone 7921G or 7925G connected to a windows computer via USB. Which statement describes the ability to read and write configuration parameters to prime the phone for its first VoWLAN association and its association to a Cisco Unified Communications Manager? A. Phones are always read-only. B. Phones are read-only and require user to be authenticated as administrator for write access. C. Phone read/write access depends on the firmware version. D. Phone depends on Cisco Unified Communications Manager configuration. Correct Answer: C : QUESTION 17 Which DHCP option is used by Vocera badges to reach a Cisco Unified Communications Manager? A. Set the option to 66. B. Set the option to 43. C. Set the option to 150. D. No option is required. Correct Answer: D

: QUESTION 18 When a Vocera badge performs a broadcast call in a properly configured VoWLAN using WLC v7.0, which two choices indicate how the QoS is marked? (Choose two.) A. Upstream marked as Best Effort. B. Upstream marked as ToS CS4. C. Upstream marked as DSCP EF. D. Downstream marked as DSCP EF. E. Downstream marked as Best Effort. F. Downstream marked as Silver. Correct Answer: CE : QUESTION 19 When designing the coverage area for high call capacity, what two actions should you take with data rates and channels? (Choose two.) A. Avoid channels with high AP co-channel interference. B. Use channels with high AP co-channel interference to avoid channel roaming. C. Set the 2.4-GHz data rate of 5.5 Mb/s to required. D. Use 5-GHz channels when possible. E. Use 2.4-GHz channels when possible. Correct Answer: AD : QUESTION 20 Which two pieces of information from the Cisco WLC v7.0 GUI does Monitor > Clients provide about a VoWLAN client? (Choose two.)

A. RSSI at current AP B. WMM state C. current MOS D. current RF channel E. current data rate Correct Answer: AB QUESTION 21 What are two benefits that result from Cisco WLC configuration of DCA for 5-GHz VoWLAN deployments? (Choose two.) A. Avoid channels that are affected by a microwave oven B. Manually remove channels that are not supported by VoWLAN clients C. Avoid 802.11n 40-MHz channels D. Avoid nearby radar E. Adjust RRM power thresholds Correct Answer: BD : QUESTION 22 What is the best practice for configuring data rates for an 802.11a VoWLAN deployment? A. Configure mandatory data rates of 9 and 54 Mb/s. Disable data rates below 6 Mb/s and all other data rates as supported. B. Configure a mandatory data rate of 6 Mb/s. Disable data rates below 6 Mb/s and configure all other data rates as supported. C. Configure a mandatory data rate of 54 Mb/s. Disable data rates below 36 Mb/s and configure all other data rates as supported. D. Configure a mandatory data rate of 12 Mb/s. Disable data rates below 12 Mb/s and all other data rates as supported. Correct Answer: D

: QUESTION 23 What is the best practice for configuring data rates for an 802.11b VoWLAN deployment? A. Configure mandatory data rates of 11 and 54 Mb/s. Disable data rates below 6 Mb/s and all other data rates as supported. B. Configure a mandatory data rate of 6 Mb/s. Disable data rates below 6 Mb/s and configure all other data rates as supported. C. Configure a mandatory data rate of 11 Mb/s. Disable data rates below 11 Mb/s and all other data rates as supported. D. Configure a mandatory data rate of 12 Mb/s. Disable data rates below 12 Mb/s and all other data rates as supported. Correct Answer: C : QUESTION 24 What is the best practice for setting the WLC v7.0 use of WLAN QoS settings to support SIP phones on a VoWLAN? A. Configure SIP with static CAC only with SIP call snooping. B. Configure SIP with static CAC only without SIP call snooping. C. Configure SIP with load-based CAC only with SIP call snooping. D. Configure SIP with load-based CAC only without SIP call snooping. E. Configure SIP with load-based CAC and TSPEC only with SIP call snooping. Correct Answer: A : QUESTION 25 Which three call information items does AirMagnet VoFi Analyzer provide? (Choose three.)

A. the codec used by the calling phone B. approximate length of the call in minutes C. MOS values throughout the duration of the call D. 802.11e access category overruns E. co-channel interference percentage during the call Correct Answer: ABC : QUESTION 26 Which WCS tool will be especially helpful to ensure that all VoWLAN configurations are consistent across all controllers? A. Inspect VoWLAN Readiness B. Traffic Stream Metrics C. Voice Audit Report D. Voice Diagnostic E. Monitor Client Detail Correct Answer: C : QUESTION 27 What are the benefits from enabling TSM for a VoWLAN using a WLC v7.0? A. provides packet loss and latency covering the end-to-end voice path on all links B. provides packet loss and latency covering the end-to-end voice path on all links and additional parameters on the VoWLAN segment C. provides packet loss covering the end-to-end voice path on all links and additional parameters on VoWLAN segment D. provides packet loss, latency, and additional parameters on VoWLAN call segment

Correct Answer: D : QUESTION 28 A downstream packet containing a DSCP value arrives at the WLC Ethernet interface from the wired source network. The WLC is configured for QoS WLAN 802.1p mapping. How does the WLC treat the CAPWAP QoS marking when leaving the controller interface for the respective AP and final wireless client destination? A. No outer CAPWAP or inner QoS tagging is applied. B. No outer CAPWAP QoS tag is applied, but the original DSCP is maintained inside CAPWAP. C. The outer CAPWAP CoS is marked and capped while the inner DSCP maintains the original marking. D. The outer CAPWAP DHCP is marked and capped without any inner DSCP value. Correct Answer: C : QUESTION 29 Which statement is correct for the LWAPP/CAPWAP AP upstream encapsulated frame for a WMM-associated client frame that is centrally switched running v5.2? A. Wireless client WMM UP classification is translated to a wired DSCP priority. B. Wireless client 802.11p classification is translated to a wired DSCP priority. C. Wireless client WMM UP classification is translated to a wired 802.1p CoS priority. D. Wireless client 802.11p classification is translated to a wired 802.1p CoS priority. Correct Answer: A :

QUESTION 30 VoWLAN implementation plans for a current mix of existing Cisco Unified Wireless IP Phones 7920G and 7921G to a final migration of Wireless IP Phones 7925G in a single WLAN. What would be the most appropriate WLC WLAN configuration to end with Wireless IP Phones 7925G? A. 7920 Client CAC = enabled only; Radio Policy = All; WMM = Disabled B. 7920 AP CAC = enabled only; Radio Policy = All; WMM = Allowed C. 7920 Client CAC = enabled only; Radio Policy = 802.11a only; WMM = Disabled D. 7920 AP CAC = enabled only; Radio Policy = 802.11a only; WMM = Allowed E. 7920 Client CAC = enabled only; Radio Policy = 802.11b/g only; WMM = Disabled F. 7920 AP CAC = enabled only; Radio Policy = 802.11b/g only; WMM = Allowed Correct Answer: B : QUESTION 31 Which three WLC actions are required to properly enable queuing with TSPEC for voice traffic? (Choose three.) A. configure WLAN setting to enable WMM B. configure WLAN Aironet information elements to enabled C. configure global 802.11b/g or 802.11a, or both, to voice CAC D. configure WLAN platinum QoS E. configure DTIM = 2 Correct Answer: ACD : QUESTION 32 Which two statements correctly describe WLAN QoS configuration related to WMM? (Choose two.)

A. 7920 AP CAC mode is not compatible with WMM policy and cannot be used at the same time. B. 7920 Client CAC mode is not compatible with WMM policy and cannot be used at the same time. C. 7920 AP CAC and 7920 client CAC modes are for 802.11b/g/n only. D. 7920 AP CAC and 7920 client CAC modes are for 802.11a/n only. E. 7920 AP CAC and 7920 client CAC modes are for 802.11a/b/g/n. Correct Answer: BC : QUESTION 33 You have a VoWLAN configured for platinum QoS, WMM, and CAC. IP phones for this VoWLAN include the Nokia and Cisco Unified Wireless IP Phones 7920G (pre-v2.0 firmware), 7921G, and 7925G. The Wireless IP Phones 7921G and 7925G work properly, but the Nokia and the Wireless IP Phones 7920G associate with the WLAN but cannot place calls. What is the issue? A. The lowest mandatory speed in the WLAN is too high and needs to be reduced. B. The Cisco Unified Wireless IP Phones 7920G and Nokia IP phones do not support TSPEC. C. EDCA needs to be enabled on the WLAN. D. HCCA needs to be enabled on the WLAN. E. The reserved roaming bandwidth setting is set too low. F. The expedited bandwidth setting needs to be enabled. Correct Answer: B QUESTION 34 Which two statements are correct if IGMP snooping is enabled on a Cisco WLC v7.0? (Choose two.)

A. The router IGMP table is updated with the IP address of the wireless clients as the last reporter. B. The IGMP packets from the wireless clients are forwarded to the router without modifications. C. The IGMP packets from the wireless clients are received at the Cisco WLC, which generates a query for the client. D. The IGMP packets from the wireless clients are received at the WLC and are used to update the router via a Cisco Group Management Protocol update from the Cisco WLC. E. The router IGMP table is updated with the IP address of the Cisco WLC as the last reporter. Correct Answer: CE : QUESTION 35 WLC v7.0 is configured for multicast with WLC-to-AP multicast mode, using IP address 239.10.10.10 and IGMP snooping enabled, with all other parameters set to default. What QoS value is given to multicast traffic between a WLC and APs? A. CS6 B. EF C. CS5 D. CS4 E. CS3 F. CS2 G. CS1 H. BE Correct Answer: H

: QUESTION 36 WLCs v7.0 have been configured for multicast and IGMP snooping enabled, with all other parameters set to default. A wireless client actively receiving a multicast group roams from WLC1 to WLC2, both of which are configured for the client IP subnet. Which statement describes the roaming process? A. There is no required action from the client and WLC2 becomes the local anchor controller. B. A new IGMP packet is required from the client and WLC2 becomes the local anchor controller. C. There is no required action from the client and WLC2 becomes foreign controller and WLC1 becomes anchor controller. D. A new IGMP packet is required from the client and WLC2 becomes foreign controller and WLC1 becomes anchor controller. Correct Answer: A : QUESTION 37 Which two multicast modes are valid for use with Ethernet bridging on a mesh AP? (Choose two.) A. mesh bridge in B. regular C. bidirectional bridge D. in E. out Correct Answer: BD : QUESTION 38 A WLC v7.0 is configured for multicast with WLC-to-AP multicast mode using IP address 239.10.10.10, IGMP snooping enabled, and all other parameters set to

default. Which two statements describe how a wired ingress broadcast and multicast frame are handled? (Choose two.) A. WLC will forward the broadcast frame to all APs and then to all WLANs. B. WLC will forward the broadcast frame to all APs and then to only WLANs with active clients. C. WLC will forward a broadcast frame to only APs and their respective WLANs with active clients. D. WLC will drop the broadcast frame. E. WLC will forward the multicast frame to all APs and then to all WLANs. F. WLC will forward the multicast frame to all APs and then to only WLANs with active clients. G. WLC will forward a multicast frame to only APs and their respective WLANs with active clients. H. WLC will drop the multicast frame. Correct Answer: DF : QUESTION 39 What three minimal configurations are required for a correctly scaled multicast configuration using WLC v7.0? (Choose three.) A. Enable global multicast mode B. Enable IGMP snooping C. Configure IGMP timeout for 60 seconds D. Configure IGMP query interval for 20 seconds E. Enable WLAN multicast VLAN feature F. Enable AP multicast mode for multicast G. Enable AP multicast mode for Unicast Correct Answer: ABF : QUESTION 40 A small wireless controller-based network is installed and configured inside a corporate building using Cisco 2500 Series controllers and 3500 Series APs using

local, monitor, and rogue detector modes. All wireless clients have been working and now require multicast applications. WLC multicast is configured using multicast mode with IP address 239.10.10.10 and other parameters set to default. However, the wireless multicast traffic has limited success and does not work throughout the corporate building. What three actions can help resolve the problems? (Choose three.) A. Enable WLC IGMP snooping. B. Change WLC from multicast mode to Unicast mode in case of wired multicast infrastructure issues. C. Verify router and switch multicast configurations. D. Change all APs to just local and rogue detector modes. E. Change all APs to local mode and monitor mode. F. Change all APs to local mode. G. Increase the WLC-to-AP multicast QoS marking. H. Verify IP address and port used by the multicast application. Correct Answer: CFH : QUESTION 41 What three changes occur when you replace a legacy 802.11a/b/g Cisco AP with an 802.11a/b/g/n Cisco 3500 Series AP? (Choose three.) A. increased data rate at reduced distance B. increased data rate at same distance C. increased data rate at increased distance D. benefits in 2.4 GHz only E. benefits in 5 GHz only F. benefits in both 2.4 and 5 GHz Correct Answer: ABF :

QUESTION 42 WLC v7.0 is properly configured for 802.11n and multicast video without the optional VideoStream. Which three of these options describe frames sent from the AP to wireless clients? (Choose three.) A. sent as gold QoS B. sent as best effort QoS C. sent at highest mandatory rate D. sent at lowest mandatory rate E. sent at client MCS data rate F. ACK per frame G. No ACKs Correct Answer: BCG : QUESTION 43 Which two applications benefit from upgrading to 802.11n? (Choose two.) A. voice B. video C. database access D. digital imaging E. SMS F. email Correct Answer: BD : QUESTION 44 How much overhead is added by CAPWAP encapsulation?

A. 4 B B. 14 B C. 28 B D. 44 B E. 50 B F. 60 B Correct Answer: F : QUESTION 45 Which four statements describe attributes of interactive video? (Choose four.) A. Packet loss is limited to 1 percent. B. Packet loss is limited to 5 percent. C. One-way latency is limited to 150 ms. D. One-way latency is limited to a few seconds. E. Jitter is limited to 30 ms. F. Jitter has no significant requirements. G. QoS marking is at CS4. H. QoS marking is at AF41. Correct Answer: ACEH : QUESTION 46 What is the minimum overhead (header plus FCS) added by 802.11 (no encryption, no WMM) between a wireless client and an AP? A. 18 B

B. 24 B C. 28 B D. 35 B E. 36 B F. 48 B Correct Answer: C : QUESTION 47 Which two statements best describe video conferencing? (Choose two.) A. Video streams require maximum quality compression and decompression. B. Video streams require high-speed compression and decompression. C. H.323 codecs are commonly used. D. MPEG codecs are commonly used. Correct Answer: BC : QUESTION 48 In order to place a call, what is the first step that a wireless phone must do? A. Associate with the wireless infrastructure. B. Authenticate with the web authentication server. C. Update its firmware with the Call Manager. D. Register with a call agent. Correct Answer: A

: QUESTION 49 VoIP clients can be impacted by jitter. Which of these statements best describes jitter? A. Jitter occurs because the receiver buffer is smaller than the sender buffer, thus packets are dropped and voice quality becomes worse. B. Jitter is defined as variation in the delay of received packets. C. Jitter can be reduced by designing cells that use only the 802.11a frequency band. D. A best practice to avoid jitter is to ensure that the end-to-end round-trip time does not exceed 150 ms. Correct Answer: B : QUESTION 50 Which of these authentication and encryption combinations would be considered the most secure? A. LEAP and WPA TKIP B. EAP-FAST and WPA2 AES C. EAP-FAST and WPA TKIP D. WPA-PSK and TKIP Correct Answer: B : QUESTION 51 What is the main difference between the Cisco Unified Wireless IP Phone 7921G and the Cisco Unified Wireless IP Phone 7925G? A. The 7925G supports 802.11a/b/g, whereas the 7921G supports only 802.11b/g.

B. The 7925G is suited for a more rugged environment. C. The 7925G has support for 802.11n, whereas the 7921G does not. D. 7925G supports WPA2, whereas the 7921G supports only WPA1. Correct Answer: B : QUESTION 52 Which one of these options best describes the ideal WLAN design for wireless VoIP clients? A. smaller cells with all configurable speeds to ensure that all clients (802.11a/b/g) can associate to the wireless infrastructure B. smaller cells with higher speeds and CAC-enabled prioritization of WMM clients C. larger cells with higher speeds and WPA2 security enabled to ensure the best possible coverage D. smaller cells with APs in the inner areas using omnidirectional antennas, and APs on the outer walls using directional antennas facing inward Correct Answer: B : QUESTION 53 What happens to a wireless client when it moves from one controller to another in a different mobility domain? A. The client will have to reauthenticate, reassociate, and get new IP address information. B. The client will have to reauthenticate and reassociate, but will be able to keep its IP address information. C. Nothing happens as long as the client roams within the same mobility group. D. It is not possible to roam to a different mobility domain. Correct Answer: A

: QUESTION 54 Which of these statements best describes Cisco Centralized Key Management? A. It allows wireless clients to cache their credentials so that, while they are roaming, they do not need to reauthenticate to the wireless infrastructure. B. It allows the wireless infrastructure to cache the credentials, thus eliminating the need to conduct a full reauthentication when roaming. C. It enables the controller to send directed roam requests to a client in situations when the controller can better service the client on a different AP than the one to which the client is associated. D. By caching their credentials, it helps clients save scanning time when looking for a new AP to join. Correct Answer: B : QUESTION 55 Controllers in a mobility group must all have which of these characteristics in common? A. mobility group name, version of controller code, and Control and Provisioning of Wireless Access Points mode B. mobility domain name, version of controller code, Control and Provisioning of Wireless Access Points mode, ACLs, and WLANs (SSIDs) C. mobility group name, version of controller code, Control and Provisioning of Wireless Access Points mode, ACLs, and WLANs (SSIDs) D. mobility domain name, version of controller code, and Control and Provisioning of Wireless Access Points mode Correct Answer: C : QUESTION 56 Which of these statements best describes the Cisco Compatible Extensions "AP Specified Max Power" feature? A. The Cisco Compatible Extensions-capable client sets its power independently and confirms with the AP if its setting is supported. B. After a Cisco Compatible Extensions client associates to an AP, that AP will inform the other surrounding APs what power settings that client supports in case it roams to another AP.

C. The AP automatically sets the transmit power of each of its Cisco Compatible Extensions- capable clients. D. The AP automatically sets the transmit and receive power of each of its Cisco Compatible Extensions-capable clients. Correct Answer: C : QUESTION 57 Using proper VoWLAN design practice, what would be the Cisco recommended total number of calls for a properly designed 802.11g cell to ensure call quality? A. 4 B. 7 C. 14 D. 20 E. 25 F. 27 Correct Answer: C : QUESTION 58 Using proper VoWLAN design practice, what would be the Cisco recommended total number of calls for a properly designed 802.11a cell to ensure call quality? A. 4 B. 7 C. 14 D. 20 E. 25 F. 27 Correct Answer: D

: QUESTION 59 Which statement best describes Cisco Centralized Key Management? A. It allows wireless clients to cache their credentials to prevent any reauthentication to the wireless infrastructure during a roaming event. B. It allows the wireless infrastructure to cache the credentials to eliminate the need for a full reauthentication when roaming. C. It allows controllers to send a directed roam request to a wireless client when a different AP can service the client better. D. It allows the wireless client to cache information from surrounding APs to reduce scan time before roaming. Correct Answer: B QUESTION 60 What are the two equivalent 802.1p CoS categories that are associated with 802.11e AC_BE? (Choose two.) A. 0 B. 1 C. 2 D. 3 E. 4 F. 5 Correct Answer: AD : QUESTION 61

Which statement best describes the ideal VoWLAN design? A. smaller cells with all data rates enabled to ensure that all clients can associate B. smaller cells with higher data rates enabled and admission control enabled through WMM C. larger cells with higher data rates enabled and WPA2 to secure voice conversations D. smaller cells with higher data rates enabled and no overlap to prevent co-channel interference Correct Answer: B : QUESTION 62 You are getting complaints from Cisco Unified Wireless IP Phone 7925 users that their phones are failing to register with the Cisco Unified Communications Manager Express server and are showing the message "Registering." What is the problem? A. The IP phones are failing to receive a DHCP address from the DHCP server. B. There is no ephone configuration for each phone in the Cisco Unified CME device. C. The IP phones are failing to receive their firmware files from the TFTP server. D. The DHCP server needs to include the command option 66 ip <ip address> to serve the appropriate load file. Correct Answer: C QUESTION 63 What is the best practice for configuring data rates for an 802.11g VoWLAN deployment? A. Configure mandatory data rates of 12 and 54 Mb/s. Disable data rates below 6 Mb/s, and configure all other data rates as supported. B. Configure a mandatory data rate of 6 Mb/s. Disable data rates below 6 Mb/s, and configure all other data rates as supported. C. Configure a mandatory data rate of 11 Mb/s. Disable data rates below 11 Mb/s, and configure all other data rates as supported. D. Configure a mandatory data rate of 12 Mb/s. Disable data rates below 12 Mb/s, and configure all other data rates as supported. Correct Answer: D

: QUESTION 64 Wireless IP phone users are complaining that during the day there are certain points in the facility where voice quality is poor. How should you troubleshoot this issue? A. Perform a detailed analysis of the voice call quality from end to end. B. Ask the users to capture voice quality statistics from their wireless IP phones the next time they have issues. C. Go into the Cisco WLC and monitor client details for WMM issues. D. Locate the APs in question and use the Cisco WLC to enable TSM to capture WLAN voice traffic statistics. Correct Answer: D : QUESTION 65 A packet arrives with a decimal value of 12. Which AF class does the packet belong to, and what is the drop probability of the packet? (Choose two.) A. AF1 B. AF2 C. AF3 D. AF4 E. low drop probability F. high drop probability G. medium drop probability Correct Answer: AG :

QUESTION 66 A Cisco WLC v7.0 is configured with the default setting for wired and wireless QoS. When a wireless client sends a voice packet to the AP, how does the AP mark the outer CAPWAP header when the packet is sent to the Cisco WLC v7.0? A. The AP uses the wireless priority value to create a matching 802.1p value in the CAPWAP header. B. The AP uses the wireless priority value to create a matching DSCP value in the CAPWAP header. C. The AP uses the wireless priority value to create both a matching 802.1p and DSCP value in the CAPWAP header. D. The AP does not match the value to the CAPWAP header, which results in best effort. Correct Answer: D : QUESTION 67 You are given a new single Cisco 2500 Series Wireless Controller with 8 to 12 APs. Which two statements describe the minimum required multicast configuration? (Choose two.) A. Enable Global Multicast Mode. B. Enable IGMP Snooping. C. Configure the IGMP Timeout for 60 seconds. D. Configure the IGMP Query Interval for 20 seconds. E. Enable the WLAN Multicast VLAN feature. F. Enable WLC to AP Multicast Mode for multicast. G. Enable WLC to AP Multicast Mode for unicast. Correct Answer: AF : QUESTION 68 IGMP snooping has been enabled on a Cisco WLC v7.0, along with any other configurations that are required for wireless multicast. After a wireless client has joined a multicast group, which IP address is listed by the router as the source reporter for that multicast group?

A. first wireless client to join B. last wireless client to join C. Cisco WLC AP management interface address D. Cisco WLC management interface address E. Cisco WLC virtual interface address F. Cisco WLC dynamic interface address Correct Answer: F : QUESTION 69 You have recently enabled multicast on your WLAN. When users join the multicast sessions, you see the traffic utilization on all the APs that are controlled by the Cisco WLC v7.0 increase, which includes those APs where there are no multicast clients. Which configuration parameter needs to be verified to prevent APs with no subscribed multicast clients from receiving traffic? A. Switches between the Cisco WLC and APs are not configured for IGMP snooping. B. The router interface that services the multicast needs to be configured for the sparse-dense multicast mode of operation. C. APs are not configured for IGMP snooping. D. The Cisco WLC is not configured for IGMP snooping. E. This is normal operation and cannot be changed. Correct Answer: D QUESTION 70 A Cisco WLC v7.0 is properly configured for 802.11n and multicasting video without the optional Cisco VideoStream. Which three options best describe the frames that are sent from the AP to the wireless clients? (Choose three.) A. unicast to subscribed clients

B. multicast to subscribed clients C. After startup, throughput is consistent. D. After startup, throughput can vary over time. E. retransmission upon failure of delivery F. no retransmission Correct Answer: BDF : QUESTION 71 Which two VoWLAN configuration parameters are required to implement a Vocera Communications System on a Cisco WLC v7.0? (Choose two.) A. Enable WLC broadcast for WLANs. B. Enable WLC multicast for WLANs. C. Disable WLAN WMM. D. Adjust the radio EDCA profile. E. Enable WLAN WMM. Correct Answer: BC : QUESTION 72 Which two statements describe the capability of TSM to collect statistics that are related to VoWLAN on Cisco WLC v7.0? (Choose two.) A. The feature is enabled by default. B. It is operational only on 802.11a/n radio. C. It is operational on both 802.11g/b/n and 802.11a/g radio. D. It requires Cisco Compatible Extensions clients for uplink statistics only. E. It requires Cisco Compatible Extensions clients for uplink and downlink statistics.

Correct Answer: CD : QUESTION 73 What are the results that you can expect when performing a Cisco WLC v7.0 link test on a wireless IP phone? A. The device must be running at least Cisco Compatible Extensions v2 or higher, for the test and results to be successful. B. The device must be running at least Cisco Compatible Extensions v4 or higher, for the test and results to be successful. C. A device that is not running a version of Cisco Compatible Extensions will show only packets that are sent and received. D. A device that is not running a version of Cisco Compatible Extensions will show packets that are sent, packets that are received, local signal strength, and SNR. Correct Answer: D : QUESTION 74 What is the main difference between the Cisco Unified Wireless IP Phones 7921G and 7925G? A. The 7925G supports 802.11a/b/g, whereas the 7921G supports only 802.11b/g. B. The 7925G is suited for a more rugged environment. C. The 7925G has support for 802.11n, whereas the 7921G does not. D. 7925G supports WPA2, whereas the 7921G supports only WPA1. Correct Answer: B

: QUESTION 75 You have two packets with decimal ToS values of 32 and 34. What are their results, respectively, in an IP precedence-only device? A. Both packets have an IP precedence tag of CS4, and the packet with the decimal value of 34 has a higher drop probability. B. The packet with the decimal value of 32 has an IP precedence tag of CS4, while the other decimal value of 34 is ignored and treated as best effort. C. The packet with the decimal value of 34 has an IP precedence tag of CS4, while the other decimal value of 32 is ignored and treated as best effort. D. Both packets have a decimal value that results in an IP precedence tag of CS4. Correct Answer: D : QUESTION 76 What is the difference between the QoS values on the wired and wireless sides of a WLAN? A. The wireless side of the network uses WMM, which carries voice in the Gold queue with a CoS of 7. The wired side of the network uses CoS/DSCP values of 5 and EF. B. The wireless side of the network uses WMM, which carries voice in the Platinum queue with a CoS of 7. The wired side of the network uses CoS/DSCP values of 5 and 40. C. The wireless side of the network uses WMM, which carries voice in the Gold queue with a CoS of 6. The wired side of the network uses CoS/DSCP values of 5 and EF. D. The wireless side of the network uses WMM, which carries voice in the Platinum queue with a CoS of 6. The wired side of the network uses CoS/DSCP values of 5 and EF. Correct Answer: D :

QUESTION 77 A wired packet that is marked for QoS priority CS4 arrives on VLAN-4 at the Cisco WLC v7.0, with a destination of a WLAN SSID-4. The Cisco WLC is configured for the wired and wireless QoS level of Silver. The infrastructure routers and switches have incorrect QoS configurations. They have mismarked the CAPWAP outer header to a QoS priority EF. Which statement is true about how the packet is sent from the AP to the final non-wmm wireless client? A. The AP sends the packet with an 802.11 priority tag of 0 (Best Effort). B. The AP sends the packet with an 802.11 priority tag of 3 (Silver). C. The AP sends the packet with an 802.11 priority tag of 5 (Gold). D. The AP sends the packet with an 802.11 priority tag of 6 (Platinum). Correct Answer: A : QUESTION 78 A wired packet that is marked for QoS priority CS4 arrives on VLAN-4 at Cisco WLC v7.0, with a destination of a WLAN SSID-4. The Cisco WLC is configured for the wired and wireless QoS level of Silver. The infrastructure routers and switches have incorrect QoS configurations. They have mismarked the CAPWAP outer header to a QoS priority EF. Which statement is true about how the packet is sent from the AP to the final WMM wireless client? A. The AP sends the packet with an 802.11 priority tag of 0 (Best Effort). B. The AP sends the packet with an 802.11 priority tag of 3 (Silver). C. The AP sends the packet with an 802.11 priority tag of 5 (Gold). D. The AP sends the packet with an 802.11 priority tag of 6 (Platinum). Correct Answer: A : QUESTION 79 Which mechanism detects if VoWLAN clients are experiencing poor signal-to-noise ratio values and causes the power of APs to increase as needed in order to

rectify signal-to-noise issues? A. CCA B. RSSI C. 802.11h D. CHD E. QBSS Correct Answer: D QUESTION 80 A single Layer 2 multicast address can map to how many IPv4 multicast addresses? A. 1 B. 8 C. 16 D. 28 E. 32 F. 64 Correct Answer: E : QUESTION 81 Which two attributes can be enabled for checking by the Voice Audit Tool in Cisco WCS v7.0? (Choose two.) A. -67 dbm cell edge B. MOS C. TSM

D. DHCP E. 25 db SNR Correct Answer: CD : QUESTION 82 IGMP snooping has been enabled on a Cisco WLC v7.0, along with any other configurations that are required for wireless multicast. Which statement describes an IGMP leave message to a router when IGMP snooping is enabled? A. The message is sourced from the wireless client. B. The message is sourced from the Cisco WLC management interface. C. The message is sourced from the Cisco WLC virtual interface. D. The message is sourced from the Cisco WLC dynamic interface. E. No message is sent, and the membership is timed out. Correct Answer: E QUESTION 83 Which two statements describe a dual-mode phone, such as the Apple iphone 4S with ios 5.0, in relation to Cisco VoWLAN? (Choose two.) A. It contains dual 2.4-GHz and 5-GHz radio. B. It contains dual cellular and 2.4-GHz radio. C. It contains dual cellular and 5-GHz radio. D. The default software enables voice on VoWLAN. E. It requires additional software to enable VoWLAN. Correct Answer: BE

: QUESTION 84 Which four statements describe the attributes of streaming video? (Choose four.) A. Packet loss is limited to 1 percent. B. Packet loss is limited to 5 percent. C. One-way latency is limited to 150 ms. D. One-way latency is limited to a few seconds. E. Jitter is limited to 30 ms. F. Jitter has no significant requirements. G. QoS marking is at CS4. H. QoS marking is at AF41. Correct Answer: BDFG : QUESTION 85 When Vocera badges communicate from badge to badge, which voice codec is used? A. G.723 B. G.729A C. G.711 D. G.729B E. the Vocera proprietary codec Correct Answer: E

: QUESTION 86 Which two statements best describe streaming video? (Choose two.) A. Video streams require maximum quality compression and decompression. B. Video streams require a high speed of compression only. C. H.323 codecs are commonly used. D. MPEG codecs are commonly used. Correct Answer: AD : QUESTION 87 A wired packet that is marked for QoS priority CS4 arrives on VLAN-4 at Cisco WLC v7.0, with a destination of a WLAN SSID-4. The Cisco WLC is configured for the wired and wireless QoS level of Silver. The infrastructure routers and switches have incorrect QoS configurations. They have mismarked the CAPWAP outer header to a QoS priority EF. Which statement is true about how the packet is sent from the AP to the final WMM wireless client? A. The AP sends the packet with an 802.11 priority tag of 0 (Best Effort). B. The AP sends the packet with an 802.11 priority tag of 3 (Silver). C. The AP sends the packet with an 802.11 priority tag of 5 (Gold). D. The AP sends the packet with an 802.11 priority tag of 6 (Platinum). Correct Answer: B : QUESTION 88 Which two statements are correct if IGMP snooping is enabled on a Cisco WLC v7.0? (Choose two.)

A. The router IGMP table is updated with the IP address of the wireless clients as the last reporter. B. The IGMP packets from the wireless clients are forwarded to the router without modifications. C. The IGMP packets from the wireless clients are received at the Cisco WLC, which generates a query for the client. D. The IGMP packets from the wireless clients are received at the WLC and are used to update the router via a Cisco Group Management Protocol update from the Cisco WLC. E. The router IGMP table is updated with the IP address of the Cisco WLC as the last reporter. Correct Answer: CE : QUESTION 89 A Cisco 7925 phone at a client's location is not registering with CUCM. The engineer analyzes a packet capture, sees that the phone receives an IP, and downloads the proper configuration file from TFTP successfully. What type of messages should the phone be sending at this point? A. H.245 B. H.323 C. MCGP D. SCCP Correct Answer: D : QUESTION 90 When reviewing a design for a voice over wireless deployment, what per-call bandwidth cost should be factored in when determining maximum calls per cell using SIP and G.711u as the codec? A. 80 bytes B. 64 bytes C. 10 bytes D. 8 bytes

Correct Answer: A : QUESTION 91 A network engineer is deploying wireless voice with a 20% overlap at -67dBm. After testing, the cell edge is determined to be 50 feet from the AP. How far away should the next AP be placed? A. 60 feet B. 70 feet C. 80 feet D. 90 feet E. 100 feet Correct Answer: D : QUESTION 92 Wireless phones at a customer's site often experience a fast busy signal when trying to initiate calls. What two actions address this issue? (Choose two.) A. decrease CAC Max Bandwidth B. increase CAC Max Bandwidth C. increase CAC Reserved Bandwidth D. decrease cell size E. increase cell size Correct Answer: BD

QUESTION 93 A support technician is reviewing wireless configurations for a voice network. They notice the off channel scan defer has been set for 4, 5, and 6. What would occur if the technician was to deselect 5 and 6? A. The access points would go off channel to scan whether there were voice devices transmitting or not. B. The access points would only go off channel to scan if there were devices transmitting with a UP of 4. C. Wireless clients transmitting at a UP of 5 will cause the access point to cease going off channel to scan. D. Cameras transmitting with a UP of 4 will cause the access point to go off channel to scan. Correct Answer: A : QUESTION 94 A customer using a 7925 phone reports that sometimes the music on hold does not come through or is choppy. The engineer checks the location history and notices it tends to occur toward the edge of the cell. The APs have their data rates set to 12Mbps as mandatory where all rates below are disabled. What is the cause of this issue? A. beacons have been disabled B. mandatory data rates set too high C. the phone requires the 11Mbps rate D. unicast is enabled Correct Answer: B : QUESTION 95 A wireless customer has called with a problem regarding voice calls. When a person is put on hold, there is silence and the music on hold does not come across. What is a requirement of music on hold?

A. Multicast routing should be configured at least to the wireless controller and client dynamic interfaces. B. There needs to be multicast routing configured network wide from the access point to the wireless controller. C. The wireless voice network needs to be configured for a QoS of platinum to permit the multicast traffic. D. The music on hold's multicast address needs to be configured for multicast direct. Correct Answer: A : QUESTION 96 When inspecting the WCS voice readiness tool, an engineer notices yellow areas. What step should you take to fix this? A. add additional APs to the coverage area to increase RSSI B. increase the power of APs in the yellow area to increase RSSI C. remove some APs in the area to reduce co-channel interference D. change the channel on some APs in the area to reduce co-channel interference Correct Answer: A : QUESTION 97 When verifying a voice survey with a Cisco 7925G phone in site survey mode, what information can be found in the CU field? A. Channel Utilization B. Connected Users C. Channel Used D. Channel Unavailable E. Concurrent Users F. CUCM Users

Correct Answer: A : QUESTION 98 Dual-mode phone users are requesting the ability to transfer calls from VoIP to cellular and the engineer has decided to implement the Handoff DN method. What information is required by the Call Manager? A. incoming caller ID B. outgoing caller ID C. SIP connection to cell provider D. H.323 connection to cell provider Correct Answer: A : QUESTION 99 An engineer is designing a wireless infrastructure to support secured wireless access for Cisco 7925 series phones. What 802.1X authentication protocol would create the least overhead for authentication, while also securely transporting credentials? A. PEAP-EAP-MSCHAPv2 B. EAP-TLS C. PEAP-EAP-GTC D. EAP-FAST E. PEAP-EAP-TLS F. EAP-MSCHAPv2 Correct Answer: D

: QUESTION 100 A trouble ticket has been turned in for a voice over wireless deployment. The customer cannot edit network profiles on their 7925 series phones and states that the profiles are locked. What key combination will unlock the profiles for editing? A. **# B. **#** C. **#123 D. 123456789*0# Correct Answer: A : QUESTION 101 A network engineer needs to reconfigure the WLAN settings on a 7925G phone, but the settings menu is locked. What key combo will unlock the menu? A. **# B. ##* C. *# D. #* Correct Answer: A : QUESTION 102 A client's VoWLAN network requires fast roaming on legacy CCXv3 certified devices, which last received an update in 2007. What two fast roaming standards and authentication methods would be supported? (Choose two.)

A. 802.11r with EAP-TLS B. 802.11r with EAP-FAST C. 802.11r with LEAP D. 802.11r with PEAP E. CCKM with EAP-TLS F. CCKM with EAP-FAST G. CCKM with LEAP H. CCKM with PEAP Correct Answer: FG : QUESTION 103 A customer has deployed an N+N redundant wireless infrastructure. In this deployment, the access points have been salt and peppered between controllers. What configuration would be necessary to cut down on the use of mobility tunnels for voice clients? A. re-anchor roamed voice clients B. KTS based CAC C. mobility anchor D. media session snooping Correct Answer: A : QUESTION 104 A customer is deploying a few remote sites and has decided to use FlexConnect mode for the wireless access points. The customer needs to have seamless roaming for the voice clients at these sites. What two configurations need to be implemented to guarantee roaming? (Choose two) A. FlexConnect Groups B. CCKM

C. 802.11r D. centrally switched SSIDs E. OKC/PKC Correct Answer: AB : QUESTION 105 A network engineer is troubleshooting a VoWLAN deployment with VoFi Analyzer and sees a WiMOS score of 2.9. How would the tool describe this value? A. Unacceptable B. Many dissatisfied C. Some dissatisfied D. All satisfied Correct Answer: B : QUESTION 106 An engineer is studying the TSM for a VoWLAN user experiencing issues using a CCXv3 device. What two items will be shown? (Choose two.) A. uplink packet latency B. uplink packet loss C. downlink packet latency D. downlink packet loss E. uplink MOS score F. downlink MOS score Correct Answer: CD

: QUESTION 107

Refer to the exhibit. An engineer notices VoWLAN calls getting dropped and uses Spectrum Expert to analyze the RF utilization. Based on the Spectrum Expert capture, what two options describe the interferer and how to mitigate it? (Choose two.) A. Radar interference B. Bluetooth interference C. microwave oven interference D. DECT 6.0 Cordless phone interference E. Disable UNII-2 channels F. Disable DFS G. Disable DCA H. Disable RRM Correct Answer: AE : QUESTION 108

Refer to the exhibit. A customer is experiencing poor call performance on their 7920 wireless phones. The engineer troubleshooting the issue has opened up Cisco Spectrum Expert to try and find the problems. Given this output, what is causing the interference? A. cordless phone B. Bluetooth device C. Xbox wireless controller D. microwave E. RFID F. jammer Correct Answer: A :

QUESTION 109 A wireless network needs for QoS to be mapped end-to-end to provide reliability for network applications. What two port configurations and QoS markings should be utilized for the switch to accept the APs tags? (Choose two.) A. For a local mode AP, the switchport should be configured as an access port trusting the DSCP tag from the AP. B. The switch should have MLS QoS enabled with all uplink and downlink ports configured to trust CoS tags. All uplink switches need to trust the CoS tags. C. The switch should have MLS QoS enabled with all uplink and downlink ports configured to trust DSCP tags. All uplink switches need to trust the DSCP tags as well. D. For a local mode AP, the switchport should be configured as an access port trusting the CoS tag from the AP. E. For a local mode AP the switchport should be configured as a trunk port trusting both DSCP or CoS tags from the AP. Correct Answer: AB QUESTION 110 How would an engineer ensure that a wireless client can conduct traffic admission? A. verify interface group is configured for traffic admission B. verify client supports WME for traffic admission C. verify traffic is admitted as it passes down the OSI layers D. verify traffic is admitted by round robin Correct Answer: B QUESTION 111 A client is WME capable and configured for AC_VOICE, but the QoS Priority of 6 is missing when analyzing an 802.11 frame. What three issues need to be investigated? (Choose three.) A. WLAN is WMM enabled B. DTIM is set to 10