Cisco 642-457 Online Practice Questions and Exam Preparation

Cisco 642-457 Online Questions & Answers

• Question 81:

  Which two options enable routers to provide basic call handling support for Cisco Unified IP Phones if they lose connection to all Cisco Unified Communications Manager systems? (Choose two.)

  A. SCCP fallback
  B. Cisco Unified Survivable Remote Site Telephony
  C. Cisco Unified Communications Manager Express
  D. MGCP fallback
  E. Cisco Unified Communications Manager Express in SRST mode
  B. Cisco Unified Survivable Remote Site Telephony
  E. Cisco Unified Communications Manager Express in SRST mode

• Question 82:

  The corporate WAN has been extended to two newly acquired sites and it includes gatekeeper support. Each site has a Cisco CallManager and an H.323 gateway that allows connection to the PSTN. Which connection method is best for these two new customers?

  A. H.225 trunk (gatekeeper-controlled)
  B. intercluster trunk (non-gatekeeper controlled)
  C. SIP trunk
  D. intercluster trunk (gatekeeper-controlled)
  D. intercluster trunk (gatekeeper-controlled)

• Question 83:

  Refer to the exhibit.

  

  All HQ phones are configured to use HQ_MRGL and all BR phones are configured to use BR_MRGL. For the HQ phones always to use the hardware conference bridge as a first choice, which configuration should be implemented?

  A. Ensure that both the hardware and software conference bridges are listed in the HQ_MRG. Ensure that the instance ID for the hardware conference bridge is 0.
  B. Ensure that both the hardware and software conference bridges are listed in the HQ_MRG. The hardware conference bridge must be configured first.
  C. Assign the hardware conference bridge to HQ_MRG. Configure a second HQ_MRG_2 and assign the software conference bridge to it. Add both the HQ_MRG and HQ_MRG_2 to the HQ_MRGL and list the HQ_MRG first.
  D. Assign the hardware conference bridge to HQ_MRG. Configure a second HQ_MRG_2 and assign the software conference bridge to it. Configure an additional HQ_MRGL_2. Add the HQ_MRG to HQ_MRGL. Add HQ_MRG_2 to HQ_MRGL_2. The HQ_MRGL should be assigned to the HQ phones. The HQ_MRGL_2 should be assigned to the HQ device pool.
  C. Assign the hardware conference bridge to HQ_MRG. Configure a second HQ_MRG_2 and assign the software conference bridge to it. Add both the HQ_MRG and HQ_MRG_2 to the HQ_MRGL and list the HQ_MRG first.

• Question 84:

  Refer to the exhibit.

  

  To stream multicast MOH to the remote site across the WAN, what should the minimum value for the Max Hops be configured as?

  A. 1
  B. 2
  C. 3
  D. 4
  C. 3

• Question 85:

  Which statement about the function of a gatekeeper is true?

  A. A gatekeeper improves call routing between servers within a single Cisco Unified Communications Manager cluster.
  B. A gatekeeper can replace the dial plan of a Cisco Unified Communications Manager cluster.
  C. A gatekeeper can simplify the dial plan between many different Cisco Unified Communications Manager clusters.
  D. Gatekeepers can be implemented to deploy RSVP-based CAC.
  C. A gatekeeper can simplify the dial plan between many different Cisco Unified Communications Manager clusters.

• Question 86:

  Which three commands are mandatory to implement SRST for five Cisco IP Phones? (Choose three.)

  A. call-manager-fallback
  B. max-ephones
  C. keepalive
  D. limit-dn
  E. ip source-address
  A. call-manager-fallback
  B. max-ephones
  E. ip source-address

• Question 87:

  Where do you specify the device mobility group and physical location after they have been configured?

  A. phones
  B. DMI
  C. device mobility CSS
  D. device pool
  E. MRGL
  F. locale
  D. device pool

• Question 88:

  Refer to the exhibit.

  

  Assume a centralized Cisco Unified Communications deployment with the headquarters in the K, and remote site in RTP. All route patterns are assigned a route list that points to the local route group. Local route groups have been configured on the U.K and RTP device pools. A U.K. user logs onto an RTP phone using the Cisco Extension Mobility feature and places an emergency call to 0000. Which statement about the emergency call is true?

  A. The call will match the U.K_Emergency route pattern partition and will egress at the RTP gateway.
  B. The call will match the U.K_Emergency route pattern partition and will egress at the U.K. gateway.
  C. The call will match the RTP_Emergency route pattern partition and will egress at the U.K. gateway.
  D. The call will match the RTP_Emergency route pattern partition and will egress at the RTP gateway.
  E. The call will fail.
  A. The call will match the U.K_Emergency route pattern partition and will egress at the RTP gateway.

• Question 89:

  Refer to the exhibit.

  

  Assuming the regions configuration to BR only permits G.729 codec, how many calls are allowed for the BR location?

  A. Total of four calls; two incoming and two outgoing.
  B. Total of two calls in either direction.
  C. Total of four calls to the BR location. Outgoing calls are not impacted by the location configuration.
  D. Total of four calls in either direction.
  E. Two outgoing calls. Incoming calls are unlimited.
  D. Total of four calls in either direction.

• Question 90:

  Which task must you perform before deleting a transcoder?

  A. Delete the dependency records.
  B. Unassign it from a media resource group.
  C. Use the Reset option.
  D. Remove the device pool.
  E. Remove the subunit.
  F. Delete the common device configuration.
  B. Unassign it from a media resource group.