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2021 Oct 400-051 braindump:

Q61. Which statement describes the key security service that is provided by the TLS Proxy function on a Cisco ASA appliance? 

A. It provides interworking to ensure that external IP phone traffic is encrypted, even if the rest of the system is unencrypted. 

B. It only applies to encrypted voice calls where both parties utilize encryption. 

C. It manipulates the call signaling to ensure that all media is routed via the adaptive security appliance. 

D. It enables internal phones to communicate with external phones without encryption. 

E. It protects Cisco Unified Communications Manager from rogue soft clients and attackers on the data VLAN. 


Q62. In which call state does the Mobility soft key act as a toggle key to enable or disable Single Number Reach for Cisco Unified Communications Manager Express SCCP IP phones? 

A. idle 

B. seized 

C. alerting 

D. ringing 

E. connected 


Q63. How are DTMF digits transported in RFC 2833? 

A. In the RTP stream with the named telephone events payload format. 

B. In the RTP stream with the regular audio payload format. 

C. In SIP NOTIFY messages. 

D. In SIP INFO messages. 

E. In SIP SUBSCRIBE messages. 


Q64. Refer to the exhibit. 

How many SIP signaling transaction(s) took place in this SIP message exchange between two SIP user agents? 

A. 1 

B. 2 

C. 3 

D. 4 

E. 5 

F. 6 


Q65. Refer to the exhibit. 

Which SIP response message should the TGW send if it cannot process the tunneled QSIG messages from the OGW? 

A. 405 Method Not Allowed 

B. 406 Not Acceptable 

C. 412 Conditional Request Failed 

D. 415 Unsupported Media Type 

E. 485 Ambiguous 


Up to date 400-051 questions:

Q66. Which two user portion format conditions are true for directory URI on Cisco Unified Communications Manager 9.1 or later? (Choose two.) 

A. It supports the $ character. 

B. It support space between characters. 

C. It has a maximum length of 50 characters. 

D. It has a maximum length of 254 characters. 

E. It is always case-sensitive. 

F. It cannot be a directory number. 

Answer: AB 

Q67. To which SIP response class do the SIP response codes 300 to 399 belong? 

A. Provisional 

B. Client Failure 

C. Server Failure 

D. Successful 

E. Redirection 


Q68. Refer to the exhibit. 

If this SIP call is initiated using early offer, which SIP message will UA#2 use to communicate its media capability to UA#1? 


B. 180 Ringing 

C. 200 OK 


E. RTP Media 


Q69. When DSP oversubscription occurs on a Cisco IOS router using DSP modules that are based on the C5510 chipset, what will happen when an analog phone connected to a FXS port goes off-hook? 

A. A fast busy tone will be played. 

B. A slow busy tone will be played. 

C. A network busy tone will be played. 

D. A dial tone will be played, but digits will not be processed. 

E. No tone will be played. 


Q70. Which statement about the iSAC on Cisco Unified Border Element is true? 

A. It is a narrow-band codec. 

B. It has a fixed frame of 30 milliseconds. 

C. It has an adaptive frame of up to 60 milliseconds. 

D. It is designed to deliver wideband sound quality in high-bit-rate applications only. 

E. It is not yet supported on the Cisco Unified Border Element (CUBE) 

F. It is not yet supported on Cisco Unified Border Element.