Cisco 400-051 Online Practice Questions and Exam Preparation

Cisco 400-051 Online Questions & Answers

• Question 361:

  Which two header fields does a SIP Agent Server use to indicate that the message needs Provisional Response Acknowledgment? (Choose two.)

  A. RAck: [Numeric value that uniquely identifies the response message]
  B. Require: 100rel
  C. Allow-Events: 100rel
  D. CSeq: [Numeric value that uniquely identifies the response message]
  E. RSeq: [Numeric value that uniquely identifies the response message]
  F. Allow: 100rel
  A. RAck: [Numeric value that uniquely identifies the response message]
  B. Require: 100rel

• Question 362:

  Refer to the exhibit.

  

  Assuming this NFAS-enabled T1 PRI configuration on a Cisco IOS router is fully functional, what will the controller T1 1/1 D-channel status be in the output of the show isdn status command?

  A. MULTIPLE_FRAME_ESTABLISHED
  B. TEI_ASSIGNED
  C. AWAITING_ESTABLISHMENT
  D. STANDBY
  E. INITIALIZED
  B. TEI_ASSIGNED

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  TEI_ASSIGNED, which indicates that the PRI does not exchange Layer 2 frames with the switch. Use the show controller t1 x command to first check the controller t1 circuit, and verify whether it is clean (that is, it has no errors) before you troubleshoot ISDN Layer 2 problem with the debug isdn q921.

• Question 363:

  What is the default treatment of a message that is left in the opening greeting default call handler in Cisco Unity Connection?

  A. It will be sent to the mailbox for the Operator user.
  B. It will be sent to the Undeliverable Messages distribution list.
  C. It will be sent to the mailbox of the system administrator.
  D. It will be sent to the All Voicemail Users distribution list.
  E. It will be sent to the General Delivery Mailbox.
  B. It will be sent to the Undeliverable Messages distribution list.

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  Default call handler is selected when we don't assign any call handler to user and with this default call handler no specific user assigned so it don't go to any specific mail box and goes to It will be sent to the Undeliverable Messages distribution list

• Question 364:

  Which three requirements must be met to share Enhanced Location Based Call Admission Control bandwidth usage between clusters? (Choose three.)

  A. The Cisco Unified Communications Manager version must be 8.6 or higher.
  B. The location name must be the same on both clusters.
  C. SIP ICT must use the Shadow location.
  D. The Location Bandwidth Manager Service should be started on only two servers in each cluster.
  E. A Location Bandwidth Manager Hub Group must be created for each cluster.
  F. Links must be created to the Shadow location.
  B. The location name must be the same on both clusters.
  C. SIP ICT must use the Shadow location.
  E. A Location Bandwidth Manager Hub Group must be created for each cluster.

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  Recommendations and Design Considerations for Unified CM Session Management Edition Deployments

  All leaf clusters that support E-L CAC should be enabled for intercluster E-L CAC with SME.

  SME can be used as a centralized bootstrap hub for the E-L CAC intercluster hub replication network. See LBM Hub Replication Network, for more information.

  All trunks to leaf clusters supporting E-L CAC should be SIP trunks placed in the shadow location to enable E-L CAC on the trunk between SME and the leaf clusters supporting E-L CAC.

  For TelePresence video interoperability, see the section on Call Admission Control Design Recommendations for TelePresence Video Interoperability Architectures.

  Connectivity from SME to any trunk or device other than a Unified CM that supports E-L CAC (some examples are third-party PBXs, gateways, Unified CM clusters prior to release 9.0 that do not support E-L CAC, voice messaging ports or

  trunks to conference bridges, Cisco Video Communications Server, and so forth) should be configured in a location other than a phantom or shadow location. The reason for this is that both phantom and shadow locations are non-terminating

  locations; that is, they relay information about locations and are effectively placeholders for user-defined locations on other clusters. Phantom locations are legacy locations that allow for the transmission of location information in versions of

  Unified CM prior to 9.0, but they are not supported with Unified CM 9.x Enhanced Locations CAC. Shadow locations are special locations that enable trunks between Unified CM clusters that support E-L CAC to accomplish it end-to-end.

  SME can be used as a locations and link management cluster

• Question 365:

  Which two protocol pairs are required to provision a Cisco Meeting Server (CMS) as an Ad-Hoc conference resource for Cisco Unified CM? (Choose two.)

  A. HTTPS and SIP/TLS
  B. HTTP and SIP/UDP
  C. HTTP and SIP/TCP
  D. HTTP and SIP/TLS
  E. HTTPs and SIP/UDP
  F. HTTPS and SIP/TCP
  A. HTTPS and SIP/TLS
  D. HTTP and SIP/TLS

• Question 366:

  Which Cisco packet voice and video digital signal processor 3 can be used for video mixing on a Cisco Integrated Router Generation 2?

  A. PVDM3-16
  B. PVDM3-32
  C. PVDM3-64
  D. PVDM3-128
  D. PVDM3-128

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  All the PVDM3 types (that is, PVDM3-16, PVDM3-32, PVDM3-64, PVDM3-128, PVDM3-192, and PVDM3-256) support switched-only video conferences. Only PVDM3-128 and higher modules support video conferencing with video mixing, transcoding and transrating.

  References: http://www.cisco.com/c/en/us/products/collateral/unified-communications/voice-video-conferencing-isr-routers/data_sheet_c78-649427.pdf

• Question 367:

  Refer to the exhibit.

  

  Which out-of-dialog SIP OPTIONS ping response put dial-peer tag 1111 into its current operational state?

  A. 401 Unauthorized
  B. 505 Version Not Supported
  C. 406 Not Acceptable
  D. 482 Loop Detected
  E. 500 Server Internal Error
  B. 505 Version Not Supported

• Question 368:

  Assume 20 bytes of voice payload, 6 bytes for the Layer 2 header, 1 byte for the end-of-frame flag, and the IP, UDP, and RTP headers are compressed to 2 bytes, how much bandwidth should be allocated to the strict priority queue for six VoIP calls that use a G.729 codec over a multilink PPP link with cRTP enabled?

  A. 80.4 kb/s
  B. 91.2 kb/s
  C. 78.4 kb/s
  D. 69.6 kb/s
  E. 62.4 kb/s
  D. 69.6 kb/s

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  Voice payloads are encapsulated by RTP, then by UDP, then by IP. A Layer 2 header of the correct format is applied; the type obviously depends on the link technology in use by each router interface: A single voice call generates two one-way RTP/UDP/IP packet streams. UDP provides multiplexing and checksum capability; RTP provides payload identification, timestamps, and sequence numbering.

• Question 369:

  Refer to the exhibit.

  

  How many simultaneous inbound calls can be handled by these two IP phones?

  A. 2
  B. 4
  C. 6
  D. 9
  E. 10
  A. 2

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  The line is configured as shared line so it will support maximum two calls at a time.

• Question 370:

  Refer to the exhibit.

  

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

  A. INVITE
  B. 180 Ringing
  C. 200 OK
  D. ACK
  E. RTP Media
  C. 200 OK

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  200 OK Indicates the request was successful.