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2021 Jun 400-051 ccie:
Q41. To which SIP response category does 301 Moved Permanently belong?
A. Provisional
B. Successful
C. Redirection
D. Client Failure
E. Server Failure
Answer: C
Q42. 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
Q43. Which two Device Pool configuration settings will override the device-level settings when a device is roaming within or outside a device mobility group? (Choose two.)
A. Adjunct CSS
B. Device Mobility CSS
C. Network Locale
D. Called Party Transformation CSS
E. AAR CSS
F. Device Mobility Group
Answer: CF
Q44. What is the minimum number of TCP sessions needed to complete a H.323 call between two H.323 gateways using slow start?
A. 0
B. 1
C. 2
D. 3
E. 4
Answer: C
Q45. Which SIP request is used by Cisco Unified Communications Manager to signal DND status changes to a Cisco 9971 IP Phone?
A. OPTIONS
B. NOTIFY
C. INFO
D. REFER
E. UPDATE
Answer: D
Down to date 400-051 p4s:
Q46. Which statement describes the Cisco best practice recommendation about priority queue bandwidth allocation in relationship to the total link bandwidth when multiple strict priority LLQs are configured on the same router interface?
A. Each LLQ should be limited to one-third of the link bandwidth capacity.
B. The sum of all LLQs should be limited to two-thirds of the link bandwidth capacity.
C. The sum of all LLQs should be limited to one-half of the link bandwidth capacity.
D. The sum of all LLQs should be limited to one-third of the link bandwidth capacity.
E. Cisco does not recommend more than one strict priority LLQ per interface.
Answer: D
Q47. To which QoS tool category does compressed RTP belong?
A. classification
B. marking
C. link efficiency
D. queuing
E. prioritization
Answer: C
Q48. Refer to the exhibit.
The exhibit shows the Cisco IOS CLI output of debug ip dhcp packet, which was captured on a router that is located at a branch office where a single IP phone is located. There is a standalone Cisco Unified Communications Manager server at the central site, which also provides DHCP services to the IP phone at the branch office. You are troubleshooting a problem where the IP phone could not register to Cisco Unified Communications Manager. You have confirmed that the IP phone received an IP address in the correct subnet and with a correct subnet mask from the DHCP server. Assuming the IP phone is correctly defined on Unified CM, which two statements about the network components are true? (Choose two.)
A. The MAC address of the IP phone is 01ec44761e3e.
B. The IP address of the DHCP server is 10.101.15.1.
C. The MAC address of the VLAN 101 interface is ec44761e3e7d.
D. The IP address of the VLAN 101 interface is 10.101.15.1.
E. There is IP connectivity between the VLAN 101 interface of the branch router and the ip-helper address that is configured on this interface.
F. There is IP connectivity between the IP phone and the ip-helper address on the VLAN 101 interface.
Answer: DE
Q49. Which method allows administrators to determine the best match impedance on analog voice ports in Cisco IOS router without having to shut and no shut the ports?
A. THL tone sweep
B. original tone sweep
C. ECAN test
D. inject-tone local sweep
E. remote loop
Answer: A
Q50. Which two statements describe the remote supervisory monitoring feature in Cisco Unified Contact Center Express? (Choose two.)
A. It is supported on Cisco Unified CCX Enhanced and Premium editions.
B. It does not require a Cisco Supervisor Desktop or any data network connectivity.
C. Agents are aware that they are being silently monitored.
D. Calls can be silently monitored from a PSTN phone.
E. It supports G.711 and G.729 codecs.
F. It works with SPAN port monitoring only.
Answer: BD