Cisco CCIE 400-051 exam actual questions Certpark

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Share some CCIE 400-051 exam questions and answers below.
A collaboration engineer has been asked to implement secure real-time protocol between a Cisco Unified CM and SIP gateway. 
Which option is a consideration for this implementation? 
A. Only T.38 and Cisco fax protocol are supported 
B. SIP require the all the time be sent in GMT 
C. Call hold RE-INVITE is not supported 
D. SRTP is supported only in cisco IOS 15.x and higher 
Answer: B 

Which two Cisco Unified Communications Manager Express hunt group mechanisms keep track of the number of hops in call delivery decisions? (Choose two.) 
A. sequential 
B. peer 
C. longest idle 
D. parallel 
E. overlay 
F. linear 
Answer: BC

Refer to the exhibit. 



A cisco collaboration engineer discovers that an instance of IOS media termination point (MTP) could not maintain stable registration with CUCM. Call manager traces is showing in the exhibit. 
What is the reason for the flapping registration? 
A. The CCM version on IOS configuration does not match the CUCM version. 
B. The IOS MTP is experiencing high CPU and is missing its keep-alive. 
C. A Firewall is blocking port 2000 intermittently between IOS Device and CUCM. 
D. Another IOS Media device is attempting to register with the same name. 
Answer: D

Refer to the exhibit. 



IP phone 1 has the MAC address 11111.1111.1111, while IP phone 2 has the MAC address 2222.2222.2222. The first two incoming calls were answered by IP phone 1, while the third incoming call was answered by IP phone 2. 
What will happen to the fourth incoming call? 
A. Both phones will ring, but only IP phone 2 can answer the call. 
B. Both phones will ring and either phones can answer the call. 
C. Only IP phone 2 will ring and can answer the call. 
D. Neither phone will ring and the call will be forwarded to 2100. 
E. Neither phone will ring and the call will be forwarded to 2200. 
Answer: B 


Refer to the exhibit. 



A cisco collaboration engineer is troubleshooting a gateway and gatekeeper problem and sees this output from a debug command. 
Which two configuration can cause this problem? (Choose two) 
A. The same zone prefix is configured in two different gatekeepers 
B. The same H323-ID is configured in two different gateways 
C. The same gw-type-prefix is configured in two different zone subnets IDs 
D. The same zone subnet ID is configured in two different gatekeepers 
E. The same E164-ID is configured in two different gateways 
Answer: BE 

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