Cisco 400-051 CCIE Collaboration Online Training
Cisco 400-051 Online Training
The questions for 400-051 were last updated at Oct 23,2025.
- Exam Code: 400-051
- Exam Name: CCIE Collaboration
- Certification Provider: Cisco
- Latest update: Oct 23,2025
Which ITU-T recommendation defines the procedures for using more than one video channel in H.320based systems?
- A . H.324
- B . H.230
- C . H.239
- D . H.264
- E . H.329
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.
Which two data frame lengths are supported by iLBC? (Choose two.)
- A . 10 milliseconds
- B . 20 milliseconds
- C . 30 milliseconds
- D . 40 milliseconds
- E . 50 milliseconds
- F . 60 milliseconds
Which two types of devices on Cisco Unified Communications Manager support iSAC? (Choose two.)
- A . MGCP
- B . SIP
- C . SCCP
- D . Music on Hold server
- E . H.323
Which statement about G.722.1 codec support on Cisco Unified Communications Manager is true?
- A . It is always preferred by Cisco Unified Communications Manager over G.711.
- B . It is a high-complexity wideband codec.
- C . It operates at bit rates of 15.2 and 13.3 kb/s.
- D . It is supported for SIP and SCCP devices.
- E . It is supported for SIP and H.323 devices.
What is the minimum number of H.225 messages required to establish an H.323 call with bidirectional media?
- A . 1
- B . 2
- C . 3
- D . 4
- E . 5
In Key Press Markup Language, which SIP request is used to deliver the actual DTMF digits?
- A . SUBSCRIBE
- B . INFO
- C . NOTIFY
- D . INVITE
- E . ACK
Refer to the exhibit.
Which SIP trunk deployment model is shown in this enterprise VoIP topology?
- A . mixed TDM and VoIP
- B . centralized C. hybrid
- C . traditional TDM
- D . distributed
Which SIP reason phrase maps to SIP response reason code 181?
- A . Ringing
- B . Call is Being Forwarded
- C . Session in Progress
- D . Unknown Number
- E . Call Does not Exist
Refer to the exhibit.
Which SIP message header is used to tunnel QSIG messages across the SIP network when the OGW receives a call bound for the TGW?
- A . Content-TypE. application/sdp
- B . Content-TypE. application/qsig
- C . Content-TypE. message/ISUP
- D . Content-TypE. message/external-body
- E . Content-TypE. application/x-q931
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