Download CCIE Collaboration Written Exam v1-1.pass4sure.400-051.2018-10-24.1e.338q.vcex

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Exam CCIE Collaboration Written Exam v1.1
Number 400-051
File Name CCIE Collaboration Written Exam v1-1.pass4sure.400-051.2018-10-24.1e.338q.vcex
Size 20.03 Mb
Posted October 24, 2018
Downloads 72
Download CCIE Collaboration Written Exam v1-1.pass4sure.400-051.2018-10-24.1e.338q.vcex

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Demo Questions

Question 1

Which statement describes a disadvantage of using the Cisco TFTP service to serve IP phone load files?

  • A: The Cisco TFTP services can run on only one Cisco Unified Communications Manager server in a cluster.
  • B: Because TFTP operates on top of UDP, there is a high risk of corrupted load file delivery at the completion of the TFTP process due to undetected data loss in the network.
  • C: If a response is not received in the timeout period, the TFTP server will not resend the data packet.
  • D: Packet loss can significantly increase the TFTP session completion time.
  • E: Because TFTP operates with an adaptive timeout period, the time to complete the file transfer is unpredictable.

Correct Answer: D

Voice traffic cannot recapture lost packets. Rather than retransmitting a lost network connection, the phone resets and attempts to reconnect its network connection. 
References: http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/6921_6941_6961/7_1_2/english/admin/guide/6921trb.html#wp1031181




Question 2

Which two statements about using the Load Server option for IP phone firmware distribution are true? (Choose two.)

  • A: This option must be enabled on at least two servers in a Cisco Unified Communications Manager cluster.
  • B: This option must be enabled on Cisco Unified Communications Manager service parameters for Cisco TFTP.
  • C: Phone firmware must be manually copied to any applicable load servers.
  • D: The load server will not function if its IP address is not in the same subnet as the IP phones.
  • E: This option is only available for newer IP phone models.
  • F: This option does not accommodate falling back to Cisco TFTP on error.

Correct Answer: CF

Choosing the Right Distribution Method 
Which of the three different image-distribution methods discussed so far is the best for a customer deployment? Each method has advantages and disadvantages, and they are summarized in Table 1. 
Table 1. Summary of Distribution Models 

  

References: http://www.cisco.com/en/US/prod/collateral/voicesw/ps6882/ps6884/white_paper_c11-583891.pdf




Question 3

Which two statements about the Peer Firmware Sharing option for IP phone firmware distribution are true? (Choose two.)

  • A: This option uses a parent-child hierarchy in which a firmware image is downloaded by a parent phone to up to three directly associated child phones.
  • B: This option must be enabled on Cisco Unified Communications Manager service parameters for Cisco TFTP.
  • C: This option mandates that the parent phone and child phones be identical, selected phone models.
  • D: This option allows firmware transfers between phones in different subnets, as long as the round-trip delay is less than 5 milliseconds.
  • E: This option uses a parent-child hierarchy that must be manually defined by the Cisco Unified Communications Manager administrator.
  • F: This option allows falling back to the TFTP server in the Cisco Unified Communications Manager cluster.

Correct Answer: CF

Peer Firmware Sharing works by setting up a parent-child hierarchy of the phones in which a firmware image is downloaded by the parent phone to a child phone. The advantage of using Peer Firmware Sharing is that instead of all phones individually retrieving a software image, they pass the image along from one phone to another phone on the same subnet. 
Advantage of PFS:
Hierarchy is automatic 
One download per phone model on a subnet 
Uses TCP 
Fails back to TFTP 
Speeds up LAN upgrades 
Reduces TFTP CPU load during upgrade




Question 4

Which two statements about the Cisco UC on UCS specs-based virtualization support model are true? (Choose two.)

  • A: It has a configuration-based approach.
  • B: It has a rule-based approach.
  • C: It has less hardware flexibility compared to the third-party server specs-based support model.
  • D: It has less hardware flexibility compared to the UC on UCS TRC support model.
  • E: VMware vCenter is optional with this support model.

Correct Answer: BC

References: http://docwiki.cisco.com/wiki/UC_Virtualization_Supported_Hardware#UC_on_UCS_Tested_Reference_Configurations




Question 5

Which definition is included in a Cisco UC on UCS TRC?

  • A: required RAID configuration, when the TRC uses direct-attached storage
  • B: configuration of virtual-to-physical network interface mapping
  • C: step-by-step procedures for hardware BIOS, firmware, drivers, and RAID setup
  • D: configuration settings and patch recommendations for VMware software
  • E: server model and local components (CPU, RAM, adapters, local storage) by name only; part numbers are not included because they change over time

Correct Answer: A

Definition of server model and local components (CPU, RAM, adapters, local storage) at the orderable part number level. 
Required RAID configuration (e.g. RAID5, RAID10, etc.) - including battery backup cache or SuperCap - when the TRC uses DAS storage 
Guidance on hardware installation and basic setup. 
Configuration of Virtual-to-physical network interface mapping is design-dependent and not included in TRC definition. 
Configuration of adapters (such as Cisco VIC, 3rd-party CNA / NIC / HBA) is design-dependent and not included in TRC definition. 
Design, installation and configuration of external hardware is not included in TRC definition, such as:
Network routing and switching (e.g. routers, gateways, MCUs, ethernet/FC/FCoE switches, Cisco Catalyst/Nexus/MDS, etc.) 
QoS configuration of route/switch network devices 
Cisco UCS B-Series chassis and switching components (e.g. Cisco UCS 6100/6200, Cisco UCS 2100/2200, Cisco UCS 5100) 
Storage arrays (such as those from EMC, NetApp or other vendors) 
Configuration settings, patch recommendations or step by step procedures for VMware software are not included in TRC definition. 
Infrastructure solutions such as Vblock from Virtual Computing Environment may also be leveraged for configuration details not included in the TRC definition.




Question 6

Which capability is support by LLDP-MED but not by Cisco Discovery Protocol?

  • A: LAN speed discovery
  • B: network policy discovery
  • C: location identification discovery
  • D: power discovery
  • E: trust extension

Correct Answer: A

LLDP-MED supports both LAN speed and duplex discovery. Cisco Discovery Protocol supports duplex discovery only, but this limited support is not seen as a problem because if there is a speed mismatch, LLDP-MED and Cisco Discovery Protocol cannot be exchanged and thus cannot be used to detect the mismatch.




Question 7

In a Cisco EnergyWise domain, which two terms describe a Cisco IP phone? (Choose two.)

  • A: endpoint
  • B: domain member
  • C: child domain member
  • D: EnergyWise agent
  • E: Cisco power distribution unit

Correct Answer: AC

References: http://www.cisco.com/en/US/docs/switches/lan/energywise/phase2_5/ios/configuration/guide/one_ent.html




Question 8

Refer to the exhibit. 

  
  
A user is going through a series of dialing steps on an SCCP IP phone (extension 1001) to call another SCCP IP phone (extension 2003). Both phones are registered to the same Cisco Unified Communications Manager cluster. Which user inputs are sent from the calling IP phone to the Cisco Unified Communications Manager, in forms of SCCP messages, after the user pressed the Dial softkey? Note that the commas in answer choices below are logical separators, not part of the actual user input or SCCP messages.

  • A: A separate SCCP message is sent to Cisco Unified Communications Manager for each of the following user inputs: 2, 0, 0, 3.
  • B: A separate SCCP message is sent to Cisco Unified Communications Manager for each of the following user inputs: 2, 0, 1, <<, 0, 3.
  • C: A single SCCP message is sent to Cisco Unified Communications Manager to report that digits 2003 have been dialed.
  • D: A single SCCP message is sent to Cisco Unified Communications Manager to report that digits 201<<03 have been dialed.
  • E: A separate SCCP message is sent to Cisco Unified Communications Manager for each of the following user inputs: 2, 0, 1, <<, 2, 0, 0, 3.

Correct Answer: C

After the user delete phone stop the digit by digit dialing and send it as a whole setup.




Question 9

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.

Correct Answer: A

DTMF digits and named telephone events are carried as part of the audio stream, and MUST use the same sequence number and time-stamp base as the regular audio channel to simplify the generation of audio waveforms at a gateway. The default clock frequency is 8,000 Hz, but the clock frequency can be redefined when assigning the dynamic payload type.




Question 10

Refer to the exhibit. 

  
  
Which DTMF relay method is advertised when the originating SIP gateway sends an INVITE message with a Call-Info header shown?

  • A: RFC 2833
  • B: SIP INFO
  • C: SIP NOTIFY
  • D: SIP KPML
  • E: In-band audio

Correct Answer: C

You can develop user-specific applications that reside on your network entity and have the ability to subscribe for event services supported by the IMG. If the network entity wants the ability to detect an entered DTMF digit (only telephone event of “###” are currently supported) from the TDM-side of a call to the IP side of a call, the entity can subscribe to the IMG for these events and receive SIP NOTIFY events containing the digit event.










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