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2021 Mar 400-051 exam answers
Q21. Which two mechanisms does Cisco EnergyWise use for neighbor discovery? (Choose two.)
A. multicast
B. LLDP-MED
C. UDP broadcast
D. Cisco Discovery Protocol
E. TCP
Answer: CD
Q22. Which statement about application inspection of SAF network services on an adaptive security appliance is true?
A. The adaptive security appliance can inspect and learn the ephemeral port numbers that are used by H.225 and H.245 on SAF-enabled H.323 trunks.
B. An explicit ACL must be configured on the adaptive security appliance for SAF-enabled SIP trunks.
C. An explicit ACL must be configured on the adaptive security appliance for SAF-enabled H.323 trunks to account for ephemeral port numbers that are used by H.225 and H.245.
D. The adaptive security appliance can inspect and learn the ephemeral port numbers that are used by H.225 on SAF-enabled H.323 trunks, but H.245 ports must be explicitly defined.
E. The adaptive security appliance provides full application inspection for SAF network services.
Answer: C
Q23. Assume 20 bytes of 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 six VoIP calls that use a G.729 codec over a multilink PPP link with cRTP enabled?
A. 80.4 kb/s
B. 91.2 kb/s
C. 78.4 kb/s
D. 69.6 kb/s
E. 62.4 kb/s
Answer: D
Q24. In addition to SIP triggers, which two trigger types can invoke applications on Cisco Unity Express? (Choose two.)
A. HTTP
B. IMAP
C. VoiceView
D. JTAPI
E. Cisco Unified CM telephony
F. voice mail
Answer: AD
Q25. 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
C. intercom
D. pickup notification
E. terminating side of a call back
F. originating side of a call back
Answer: DE
Regenerate 400-051 exams:
Q26. Which SIP response is considered a final response?
A. 183 Session in Progress
B. 199 Early Dialog Terminated C. 200 OK
D. 180 Ringing
E. 100 Trying
Answer: C
Q27. Which capability is support by LLDP-MED but not by Cisco Discovery Protocol?
A. LAN speed discovery
B. network policy discovery
C. location identification discovery
D. power discovery
E. trust extension
Answer: A
Q28. Which capability is supported by Cisco Discovery Protocol but not by LLDP-MED?
A. LAN speed and duplex discovery
B. network policy discovery
C. location identification discovery
D. power discovery
E. trust extension
Answer: E
Q29. Which Cisco Unified Contact Center Express core system software component communicates with Cisco Agent Desktop for agent state control and call control?
A. Unified CCX Engine
B. Database
C. Monitoring
D. Recording
E. RmCm
Answer: A
Q30. Which SIP header is used by Cisco Unified Communication Manager to support the Redirected Number ID Service?
A. replaces
B. RPID
C. diversion
D. join
E. P-charging-vector
Answer: C