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2021 Mar 400-051 vce
Q111. Which two statements about the Peer Firmware Sharing option for IP phone firmware distribution are true? (Choose two.)
A. This option uses a parent-child hierarchy in which a firmware image is downloaded by a parent phone to up to three directly associated child phones.
B. This option must be enabled on Cisco Unified Communications Manager service parameters for Cisco TFTP.
C. This option mandates that the parent phone and child phones be identical, selected phone models.
D. This option allows firmware transfers between phones in different subnets, as long as the round-trip delay is less than 5 milliseconds.
E. This option uses a parent-child hierarchy that must be manually defined by the Cisco Unified Communications Manager administrator.
F. This option allows falling back to the TFTP server in the Cisco Unified Communications Manager cluster.
Q112. To which QoS tool category does compressed RTP belong?
C. link efficiency
Q113. Which RAS message is used between two gatekeepers to resolve an alias address?
Q114. Which H.245 information is exchanged within H.225 messages in H.323 Fast Connect?
A. Terminal Capability Set
B. Open Logical Channel
C. Master-Slave Determination
D. Call Setup
E. Call Progress
Q115. To which SIP response category does 301 Moved Permanently belong?
D. Client Failure
E. Server Failure
Abreast of the times 400-051 practice test:
Q116. In Cisco IOS routers that use low latency queuing, which algorithm is used to presort traffic going into the default queue?
A. first-in, first-out
B. last-in, first-out
C. weighted round robin
D. fair queuing
E. random processing
Q117. Which two statements describe security services that are provided by the Phone Proxy function on a Cisco ASA appliance? (Choose two.)
A. It is supported only on phones that use SCCP.
B. It is supported on an adaptive security appliance that runs in transparent mode.
C. It provides interworking to ensure that the external IP phone traffic is encrypted, as long as the Cisco Unified Communications Manager cluster runs in secure mode.
D. It provides a proxy of phone signaling, with optional use of NAT, to hide the Cisco Unified Communications Manager IP address from the public Internet.
E. It proxies phone media so that internal phones are not directly exposed to the Internet.
F. It supports IP phones that send phone proxy traffic through a VPN tunnel.
Q118. Company ABC is planning to migrate from MCS-hosted Cisco Unified Communications Manager applications to Cisco UC on UCS B-Series servers. Which statement about installation media support is true for this migration?
A. The install log can be written to a USB flash drive that is attached to the UCS server.
B. The answer file that is generated by the Answer File Generator (platformConfig.xml) can be read from a USB flash drive to perform an unattended installation on the UCS server.
C. The Cisco Music on Hold USB audio sound card can be mapped to a virtual USB port on a VMware virtual machine on the UCS server.
D. The answer file that is generated by the Answer File Generator (platformConfig.xml) can be read from an FLP image that is mounted in a virtual floppy drive.
E. The Cisco Music on Hold USB audio sound card can be mapped to a virtual serial port on a VMware virtual machine on the UCS server.
Q119. Which two call processing features have a lower priority than the Do Not Disturb settings on a Cisco IP phone? (Choose two.)
A. park reversion for a locally parked call
B. hold reversion
D. pickup notification
E. terminating side of a call back
F. originating side of a call back
Q120. Assume 6 bytes for the Layer 2 header, 1 byte for the end-of-frame flag, and a 40-millisecond voice payload, how much bandwidth should be allocated to the strict priority queue for five VoIP calls that use a G.729 codec over a multilink PPP link?
A. 87 kb/s
B. 134 kb/s
C. 102.6 kb/s
D. 77.6 kb/s
E. 71.3 kb/s