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2021 Mar 400-051 answers
Q1. 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.
Answer: DE
Q2. Assume 18 bytes for the Layer 2 header and a 10-millisecond voice payload, how much bandwidth should be allocated to the strict priority queue for three VoIP calls that use a G.722 codec over an Ethernet network?
A. 331.2 kb/s
B. 347.8 kb/s
C. 261.6 kb/s
D. 274.7 kb/s
E. 238.4 kb/s
Answer: A
Q3. Which SIP request is used by a Cisco 9971 IP Phone to signal DND status changes to Cisco Unified Communications Manager?
A. REGISTER
B. NOTIFY
C. INFO
D. PUBLISH
E. UPDATE
Answer: D
Q4. Which statement describes how the digit zero is handled in the predefined restriction tables in Cisco Unity Connection?
A. Zero is listed in the Default Out-Dial Restriction table.
B. Zero is listed in the Default System Transfer Restriction table.
C. Zero is listed in the Default Transfer Restriction table.
D. Zero is listed in the User-Defined and Automatically Added Alternate Extensions Restriction table.
E. Zero is not listed in any default restriction table configuration.
Answer: E
Q5. Assume a 30-millisecond voice payload, 6 bytes for the Layer 2 header, 1 byte for the end-of-frame flag, and the IP, UDP, and RTP headers are compressed to 2 bytes, how much bandwidth should be allocated to the strict priority queue for eight VoIP calls that use a
G.729 codec over a multilink PPP link with cRTP enabled?
A. 121.6 kb/s
B. 92.8 kb/s
C. 88.4 kb/s
D. 83.2 kb/s
E. 78.4 kb/s
Answer: D
Most recent 400-051 exam prep:
Q6. Refer to the exhibit.
Which SIP message header is used to tunnel QSIG messages across the SIP network when the OGW receives a call bound for the TGW?
A. Content-TypE. application/sdp
B. Content-TypE. application/qsig
C. Content-TypE. message/ISUP
D. Content-TypE. message/external-body
E. Content-TypE. application/x-q931
Answer: B
Q7. Refer to the exhibit.
In this high-availability Cisco IM and Presence deployment with three subclusters, the first user is assigned to server 1A; the second user is assigned to server 2A; and the third user is assigned to server 3A. Assume that the Cisco IM and Presence is set to Active/Standby mode, to which server should the fourth user be assigned?
A. 1A
B. 3B
C. 1B
D. 2A
E. 3A
Answer: A
Q8. Which two applications can connect directly with a Cisco Unified Communications Manager Session Management Edition cluster? (Choose two.)
A. Cisco Unity
B. Cisco Unified Meeting Place Express
C. Cisco Unified Contact Center Enterprise
D. Cisco Unified Contact Center Express
E. Cisco Unified Communications Manager Attendant Console
F. Cisco Emergency Responder
Answer: AB
Q9. What is the number of directory URIs with which a Cisco Unified Communications Manager directory number can be associated?
A. 1
B. up to 2
C. up to 3
D. up to 4
E. up to 5
Answer: E
Q10. What does a weight represent in the Enhanced Location Call Admission Control mechanism on Cisco Unified Communications Manager?
A. It defines the bandwidth that is available between locations.
B. It defines the bandwidth that is available on a link.
C. It is the amount of bandwidth allocation for different types of traffic.
D. It is used to provide the relative priority of a link between locations.
E. It is used to provide the relative priority of a location.
Answer: D