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Q11. Which design restriction applies to Cisco Unified Communications Manager Session Management Edition clustering over the WAN deployment with extended round-trip times in Cisco Unified CM 9.1 and later releases? 

A. SIP and H.323 intercluster trunks are supported. 

B. Only SIP trunk is supported. 

C. SIP trunks and H.323 gateways are supported. 

D. A minimum of 1.544 Mb/s bandwidth is required for all traffic between any two nodes in the cluster. 

E. Only RSVP agents can be configured and registered to the SME cluster as media resources. 

Answer:


Q12. Which entity signs a Cisco IP phone LSC? 

A. Godaddy.com Enrollment Server 

B. Manufacturer Certificate Authority 

C. Registration Authority 

D. Certificate Authority Proxy Function 

E. Cisco Certificate Authority 

Answer:


Q13. In Cisco IOS routers, which chipset is the PVDM2-32 DSP hardware based on? 

A. C5441 

B. C549 

C. C5510 

D. C5421 

E. Broadcom 1500 

Answer:


Q14. How many signaling bits are there in each T1 time slot using channel associated signaling with Super Frame? 

A. 1 

B. 2 

C. 4 

D. 8 

E. 12 

Answer:


Q15. Refer to the exhibit. 

IP phone 1 has MAC address of 1111.1111.1111, and IP phone 2 has MAC address of 2222.2222.2222. The first two incoming calls rang both phones and were answered by IP phone 2. 

Which option describes what will happen to the third incoming call? 

A. Both phones ring, but only IP phone 1 can answer the call. 

B. Both phones ring and either phone can answer the call. 

C. Only IP phone 1 rings and can answer the call. 

D. Neither phone rings and the call is forwarded to 2100. 

E. Neither phone rings and the call is forwarded to 2200. 

Answer:


Up to date 400-051 sample question:

Q16. Which two compression formats for high-definition video have technical content that is identical to H.264? (Choose two.) 

A. MPEG-4 Part 10 

B. MPEG-4 Part 14 

C. MPEG-2 Part 7 

D. AVC 

E. VC3 

F. VP8 

Answer: AD 


Q17. 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:


Q18. 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:


Q19. Which message-handling behavior describes how Cisco Unity Connection Single Inbox works for Outlook users who do not have ViewMail installed? 

A. Cisco Unity Connection voice messages are treated as emails without a WAV file attachment. 

B. Cisco Unity Connection voice messages are treated as voice messages. 

C. Cisco Unity Connection voice messages are treated as emails with a WAV file attachment. 

D. Cisco Unity Connection adds a Voice Outbox folder to the Outlook mailbox. 

E. Replies to Cisco Unity Connection voice messages are sent to Exchange as well as the Cisco Unity Connection mailbox for the recipient. 

Answer:


Q20. Refer to the exhibit. 

A user is going through a series of dialing steps on a SIP Type B IP phone (for example, a Cisco 7975) to call an SCCP IP phone. Both phones are registered to the same Cisco Unified Communications Manager cluster. Assuming that the calling SIP phone is not associated with any SIP dial rules, which statement about how digits are forwarded to Cisco Unified Communications Manager for further call processing is true? 

A. Each digit is sent to Cisco Unified Communications Manager in a SIP NOTIFY message KPML event, at the time that the user enters the digit on the keypad. 

B. The SIP IP phone will wait for the interdigit timer to expire, or for the Dial softkey to be selected before sending each digit to Cisco Unified Communications Manager as a separate KPML event in a SIP NOTIFY message. 

C. The SIP IP phone will wait for the interdigit timer to expire, or for the Dial softkey to be selected.before sending all digits to Cisco Unified Communications Manager in a SIP INVITE message. 

D. The SIP IP phone will wait for the interdigit timer to expire or for the Dial softkey to be selected before sending the first digit in a SIP INVITE and the subsequent digits in SIP INFORMATION messages. 

E. The SIP IP phone will send all digits to Cisco Unified Communications Manager in a SIP INVITE message as soon as the fourth digit is pressed. 

Answer: