What call performance statistics are reported on the Cisco Wireless IP Phone 7921 user interface?（）A、minimum jitterB、maximum jitterC、upstream standard packet deviationD、average MOS valueE、average conceal rate

第1题：

You are troubleshooting a one-way call problem with a Cisco 7920 wireless IP phone on a standaloneWLAN. What may have caused this problem？（）

• A、The minimum data rate is not set to 11 Mbps.
• B、An address resolution protocol has been disabled.
• C、Publicly Secure Packet forwarding is enabled.
• D、The access point is set to the least congested channel.

第2题：

What is the recommended Cisco DSCP value for a switch or router passing Cisco Unified Wireless IP Phone 7921G RTP packets?（）

• A、CS3
• B、CS1
• C、EF
• D、5
• E、6

第3题：

Which wireless LAN statistics are reported from the Cisco Unified Wireless IP Phone 7921G via a directly connected web browser?（）

• A、duplicate sender packets
• B、unicast packet retry rate
• C、unicast packet retry ratio
• D、association rejections

第4题：

Which statement describes the call behavior of the Cisco Unified Wireless IP Phone 7921G when it roams from 802.11b to 802.11a?（）

• A、The phone does a directed call hangup on 802.11b，then does an auto-redial on 802.11a，creating a  new call.
• B、The phone does a directed call hangup on 802.11b， then the user does a redial on 802.11a，creating a  new call.
• C、The phone does a disassociation on 802.11b and an association on 802.11a，and call remains up if the  subnet has not changed.
• D、The phone does not roam from 802.11b to 802.11a when on an active call.
• E、The phone must switch network profiles to roam from 802.11b to 802.11a.

第5题：

Which configuration should be done in order to improve the performance of the Cisco Unified Wireless IP Phone 7921G in a WLAN infrastructure?（）

• A、enable aggressive load balancing
• B、enable coverage hole detection
• C、disable dynamic transmit power control
• D、enable short preamble

第6题：

You are troubleshooting a one-way call problem with a cisco 7920 wireless ip phone on a standalone wlan. What may cause this problem？（）

• A、the minimum data rate is not set to 11 mbps.
• B、an address resolution protocol has been disabled
• C、publicly secure packet forwarding is enabled
• D、the access point is set to the least congested channel.

第7题：

What does a Cisco Unified Wireless IP Phone 7921G deployment require（）？

• A、more access points than a data network
• B、fewer access points than a data network
• C、less SNR than a data network
• D、specific relative access point placement

第8题：

For an active Cisco Unified Wireless IP Phone 7921G 5 GHz site survey， what are the mostappropriate client test settings to use with the AirMagnet site survey tool？（）

• A、100 mW， 24 Mb/s
• B、100 mW， 18 Mb/s
• C、25 mW， 18 Mb/s
• D、3.2 mW， 54 Mb/s

第9题：

Cisco recommends a decibel referenced to 1 milliwatt signal level for the coverage cell edge at thepredetermined data rate that is needed to support the VoWLAN device and call capacityrequirements. What is that signal level value for Cisco Unified Wireless IP Phones 7920， 7921G， and7925G？（）

• A、-65 dBm
• B、-67 dBm
• C、-69 dBm
• D、-70 dBm

第10题：

What is the Cisco recommended setting for the Cisco Unified Wireless Network WLC Voice Call Admission Control Max RF Bandwidth to support the Cisco Unified Wireless IP Phone 7921G?（）

• A、nominally 30 percent to best align with Cisco Unified Communications System recommendations
• B、100 percent to ensure that the VoWLAN calls can use all the available bandwidth, if needed
• C、system default of 75 percent
• D、40 to 60 percent
• E、voice CAC should be left disabled unless wired QoS is configured