Cisco 642-457 Online Practice Questions and Exam Preparation

Cisco 642-457 Online Questions & Answers

• Question 51:

  Which system configuration is used to set a restriction on audio bandwidth?

  A. region
  B. location
  C. physical location
  D. licensing
  B. location

• Question 52:

  You have been asked to deploy Cisco Extension Mobility Cross Cluster for a distributed call processing environment. During the initial extension mobility login request, how does the visiting cluster determine if the user is a local user or a remote user?

  A. by using a third-party automatic provisioning tool to verify user ID
  B. by broadcasting a request to all clusters to verify the user type
  C. from user IDs that are created by default when the user logs in
  D. by using Extension Mobility Cross Cluster Session Initiation Protocol (SIP) trunks
  E. by verifying against the local database
  F. by verifying the visiting Trivial File Transfer Protocol
  E. by verifying against the local database

• Question 53:

  Which statement is not true about GARP? (SourcE. Hardening the IP Phone)

  A. GARP attacks require access to the target LAN or VLAN.
  B. GARP can be used for a man-in-the-middle attack.
  C. GARP is normally used for HSRP.
  D. GARP can be disabled at Cisco IP phones.
  C. GARP is normally used for HSRP.

• Question 54:

  Which statement about H.323 Gatekeeper Call Admission Control is true?

  A. Gatekeeper Call Admission Control applies to centralized Cisco Unified Communications deployments that use locations based Call Admission Control.
  B. Gatekeeper Call Admission Control applies to distributed Cisco Unified Communications deployments.
  C. Gatekeeper Call Admission Control applies only to distributed Cisco Unified Communications Express deployments.
  D. Gatekeeper Call Admission Control setting is configured in Cisco Unified Communications Manager.
  B. Gatekeeper Call Admission Control applies to distributed Cisco Unified Communications deployments.

• Question 55:

  When multiple Cisco Extension Mobility profiles exist, which actions take place when a user tries to log in to Cisco Extension Mobility?

  A. The login will fail because only a single Cisco Extension Mobility profile is allowed.
  B. The user must select the desired profile.
  C. The user must login to both profiles in the order they are presented.
  D. The user may login to both profiles in any order.
  E. Login will only be allowed to multiple profiles if the service parameter Allow Multiple Logins is enabled.
  B. The user must select the desired profile.

• Question 56:

  When an external call is placed from Ajax, they would like the ANI that is sent to the PSTN to be the main number, not the extension. For domestic calls, they would like 10 digits sent; for international calls, they would like to send the country code 1 and the 10 digits. How can this be accomplished?

  A. Add a translation pattern to the dial peers in the gateway that adds the appropriate digits to the outgoing ANI.
  B. In the external call route patterns, set the external phone number mask to the main number. Use 10 digits in the domestic route pattern and 1 followed by the main number digits in the international route patterns.
  C. Use a calling party transform mask for each route group in the corresponding route list configuration. Set the explicit 10-digit main number for domestic calls and 1 followed by the main number for the international route patterns.
  D. In the directory number configurations, set the prefix digits field to the country code and the 10 digits of the main number. This will be truncated to the 10-digit number for domestic calls and sent out in its entirety for international calls.
  C. Use a calling party transform mask for each route group in the corresponding route list configuration. Set the explicit 10-digit main number for domestic calls and 1 followed by the main number for the international route patterns.

• Question 57:

  Refer to the exhibit.

  

  IT shows an H.323 gateway configuration in a Cisco Unified Communications Manager environment. An inbound PSTN call to this H.323 gateway fails to connect to IP phone extension 2001. The PSTN user hears a reorder tone. Debug isdn q931 on the H.323 gateway shows the correct called-party number as 5015552001. Which two configuration changes can correct this issue? (Choose two.)

  A. Add port 1/0:23 to dial-peer voice 123 pots.
  B. Ensure that the Significant Digits for inbound calls on the H.323 gateway configuration is 4.
  C. Add a voice translation profile to truncate the number from 10 digits to 4 digits. Apply the voice translation profile to the Voice-port. The configuration field "Significant Digits for inbound calls" is left at default (All).
  D. Add the command h323-gateway voip id on interface vlan120.
  E. Change the destination-pattern on the dial-peer voice 23000 VoIP to 501501? and change the Significant Digits for inbound calls to 4.
  B. Ensure that the Significant Digits for inbound calls on the H.323 gateway configuration is 4.
  E. Change the destination-pattern on the dial-peer voice 23000 VoIP to 501501? and change the Significant Digits for inbound calls to 4.

• Question 58:

  Which action configures AAR to route the calls that have been rejected by the gatekeeper CAC through the PSTN?

  A. Configure Cisco IP Phones for AAR.
  B. Configure AAR to work with SRST.
  C. Configure AAR to work with CTI route points.
  D. This configuration is not possible using AAR.
  D. This configuration is not possible using AAR.

• Question 59:

  Refer to the exhibit.

  

  How does the Cisco Unified Communications Manager advertise dn-block 1?

  A. 4XXX and the ToDID will 0:
  B. 4XXX and the ToDID will 0:1972555
  C. 4XXX
  D. 4XXX and the ToDID will 0:+ 1972555
  E. 19725554XXX
  B. 4XXX and the ToDID will 0:1972555

• Question 60:

  What is the fastest way for an engineer to test the implementation of SRST in a production environment?

  A. Shut down the Cisco Unified Communications Manager Servers.
  B. Shut down the switch ports connected to the Cisco Unified Communications Manager Servers.
  C. Add a null route to the publisher Cisco Unified Communications Manager at the remote router. Remove the null route when the operation is verified.
  D. Unplug the IP phones from their switch ports.
  E. Verification is not needed.
  C. Add a null route to the publisher Cisco Unified Communications Manager at the remote router. Remove the null route when the operation is verified.