Cisco 642-457 Online Practice Questions and Exam Preparation

Cisco 642-457 Online Questions & Answers

• Question 11:

  Which option configures call preservation for H.323-based SRST mode?

  A. voice service voip h323 call preserve
  B. call preservation not possible with H.323
  C. call-manager-fallback preserve-call
  D. dial-peer voice 1 voip call preserve
  A. voice service voip h323 call preserve

• Question 12:

  Refer to the exhibit.

  

  The HQ site uses area code 650. The BR1 site uses area code 408. The long distance national code for PSTN dialing is 1. To make a long distance national call, an HQ or BR1 user dials access code 9, followed by 1, and then the 10-digit number. Both sites use MGCP gateways. AAR must use globalized call routing using a single route pattern. Assume that all outgoing PSTN numbers are localized at the egress gateway as shown in the exhibit.

  What should the AAR group prefix be?

  A. 9
  B. 91
  C. none
  D. +
  E. +1
  C. none

• Question 13:

  Which statement is true when device mobility mode is enabled or disabled in the Phone Configuration window?

  A. The device mobility mode phone settings take precedence over the service parameter settings.
  B. The service parameter settings take precedence over the device mobility mode phone settings.
  C. The combined service parameter settings and the device mobility mode phone settings will be used.
  D. The default settings will be used due to the conflicts.
  A. The device mobility mode phone settings take precedence over the service parameter settings.

• Question 14:

  You are entering the description for the Service Advertisement Framework forwarder. Which three characters should you avoid entering in the description? (Choose three.)

  A. < >
  B. and
  C. %
  D. #
  E. $
  F. @
  A. < >
  B. and
  C. %

• Question 15:

  Assume that the Cisco IOS SAF Forwarder is configured correctly. Which minimum configurations on Cisco Unified Communications Manager are needed for the SAF registration to take place?

  A. SAF Trunk, SAF Security Profile, SAF Forwarder, and CCD Advertising Service
  B. SAF Trunk, SAF Security Profile, SAF Forwarder, and CCD Requesting Service
  C. SAF Trunk, SAF Security Profile, SAF Forwarder, CCD Requesting Service, and CCD Advertising Service
  D. SAF Trunk, SAF Security Profile, and SAF Forwarder
  E. SAF Trunk, CCD Requesting Service, and CCD Advertising Service
  B. SAF Trunk, SAF Security Profile, SAF Forwarder, and CCD Requesting Service

• Question 16:

  Which two options are effective mechanisms to restrict the maximum number of voice calls on a WAN link? (Choose two.)

  A. Configure a gatekeeper with an SIP trunk.
  B. Configure a gatekeeper and a gatekeeper-controlled trunk in Cisco Unified Communications Manager with bandwidth control.
  C. Configure Cisco Unified Communications Manager regions.
  D. Configure Cisco Unified Communications Manager locations.
  B. Configure a gatekeeper and a gatekeeper-controlled trunk in Cisco Unified Communications Manager with bandwidth control.
  D. Configure Cisco Unified Communications Manager locations.

• Question 17:

  On which Cisco Unified Communications Manager configuration parameter does the CODEC that a Cisco IP Phone uses for a call depend?

  A. enterprise parameters
  B. media resources
  C. physical location
  D. region
  E. location
  D. region

• Question 18:

  How is a SIP trunk in Cisco Unified Communications Manager configured for SIP precondition?

  A. The configuration is done by selecting a SIP precondition trunk for trunk type.
  B. The configuration is automatically selected when RSVP is enabled for the location assigned to the trunk.
  C. SIP precondition is configured by selecting E2E for RSVP over SIP on the default SIP profile assigned to the SIP trunk.
  D. SIP precondition is configured by configuring a new SIP profile and selecting E2E for RSVP over SIP. The new SIP profile must then be assigned to the SIP trunk.
  D. SIP precondition is configured by configuring a new SIP profile and selecting E2E for RSVP over SIP. The new SIP profile must then be assigned to the SIP trunk.

• Question 19:

  Refer to the exhibit. You have configured transcoder resources in both an IOS router and a Cisco Unified Communications Manager. When you review the configurations in both devices the IP addresses and transcoder names are correct, but the transcoder is failing to register with the Cisco Unified Communications Manager. Which command needs to be edited to allow the transcoder to register properly?

  

  A. The associate profile and dsp farm profile numbers need to match associate ccm 2 command.
  B. The associate ccm 2 priority 1 command needs to be changed so the ccm value matches identifier 1 in the sccp ccm 10.1.1.1 command.
  C. The sccp ccm group number needs to match the associate ccm 2 command.
  D. The maximum sessions command must match the number of codecs configured under the dsp farm profile.
  E. The sccp ccm group number must match the voice-card number.
  B. The associate ccm 2 priority 1 command needs to be changed so the ccm value matches identifier 1 in the sccp ccm 10.1.1.1 command.

• Question 20:

  What is the purpose of configuring a hardware-based MTP when deploying Cisco Unified Communications Manager?

  A. to allow for supplementary services such as hold, transfer, and conferencing
  B. when you need support for up to 24 MTP sessions on the same server and 48 on a separate server
  C. when you need the ability to grow support by using DSPs
  D. when you want to only use Cisco Unified Communications Manager resources
  C. when you need the ability to grow support by using DSPs