What is the payload size of a wireless IP phone in a call us

第1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2题：

What are three physical interface properties?（）

• A、payload scrambling
• B、virtual circuit identifier
• C、FCS
• D、link speed
• E、IP address

第3题：

Which statement is true about a distributed call control environment and the processing of dialed digits from an IP phone？（）

• A、The router that is directly connected to the IP phone will look up the called number in its call routing table.
• B、The router that is directly connected to the IP phone will inform its call agent when a service request is detected.
• C、When the IP phone is picked up，the IP phone initiates the service request.
• D、The directly connected router passes the collected digits to its call agent，and the call agent looks up in its call-routing table the called number.

第4题：

Which keypad sequence will reset the Cisco Unified Wireless IP Phone 7921 to factory default?（）

• A、***
• B、**#
• C、**1
• D、**2

第5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

第6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7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8题：

You are troubleshooting a problem with a cisco 7920 wireless ip phone that is causing the phone to drop calls. the problem appears to be a roaming bandwidth issuE.  in order to verify what kind of issue it is， you decide to increase the bandwidth reserved for roaming on the wlan controller to the maximum. What level do you set the bandwidth to？（）

• A、25 percent
• B、15 percent
• C、5 percent
• D、35 percent

第9题：

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

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

第10题：

What will improve the battery life of a Cisco Unified Wireless IP Phone 7921G?（）

• A、configuring phone to auto select network
• B、configuring beacon period to 80 ms
• C、configuring DTIM period to 2
• D、enabling RRM