Cisco 642-457 Online Practice Questions and Exam Preparation

Cisco 642-457 Online Questions & Answers

• Question 91:

  Which option describes a function of SIP preconditions?

  A. SIP preconditions enable end-to-end RSVP over an SIP trunk.
  B. SIP preconditions enable RSVP between Cisco IP Phones.
  C. SIP preconditions can be enabled in a gatekeeper.
  D. SIP preconditions enable end-to-end RSVP for calls through the PSTN.
  A. SIP preconditions enable end-to-end RSVP over an SIP trunk.

• Question 92:

  If your IP telephony administrator asks you to configure a local zone for your dial plan to control the volume of calls between two end points in a centralized multisite environment, which two types of Call Admission Control can be implemented? (Choose two.)

  A. locations based
  B. automated alternate routing
  C. gatekeeper based
  D. SRST
  E. Cisco Unified Communications Manager based
  A. locations based
  B. automated alternate routing

• Question 93:

  Which solution is needed to enable presence and extension mobility to branch office phones during a WAN failure?

  A. SRST with MGCP fallback
  B. SRST without MGCP fallback
  C. Cisco Unified Communications Manager Express in SRST mode
  D. SRST with VoIP dial peers to Cisco Unified Communications Manager Express
  C. Cisco Unified Communications Manager Express in SRST mode

• Question 94:

  Which Cisco IOS command is used to verify that the Cisco Unified Communications Manager Express has registered with the SAF Forwarder?

  A. show eigrp service-family ipv4 clients
  B. show eigrp address-family ipv4 clients
  C. show voice saf dndb all
  D. show saf registration
  E. show ip saf registration
  A. show eigrp service-family ipv4 clients

• Question 95:

  An MOH server is configured to stream a local .wav file that is located on its own hard disk drive. An external caller reports that they can only hear the TOH when they are placed on hold. Which two could be the problem? (Choose two.)

  A. The sound card is missing from the server.
  B. The music CD is corrupted.
  C. Insufficient bandwidth is configured.
  D. Unicast streams exceeded the maximum that was configured.
  C. Insufficient bandwidth is configured.
  D. Unicast streams exceeded the maximum that was configured.

• Question 96:

  Which statement about SIP precondition is most correct?

  A. When configuring SIP precondition, the SIP trunk must have access to an RSVP agent.
  B. When configuring SIP precondition, the IP phones must have access to an RSVP agent.
  C. When configuring SIP precondition, the IP phones and SIP trunk must have access to an RSVP agent.
  D. RSVP agents are only required for the IP phones. SIP trunks require RSVP agents only when fall back to local RSVP is configured.
  E. SIP trunk will always require RSVP agents regardless of what RSVP type is configured.
  D. RSVP agents are only required for the IP phones. SIP trunks require RSVP agents only when fall back to local RSVP is configured.

• Question 97:

  Which two statements about the functionality of a gatekeeper are true? (Choose two.)

  A. Cisco Unified Communications Manager has gatekeeper functionality built in.
  B. Cisco Unified Communications Manager registers with a gatekeeper via SIP.
  C. Cisco Unified Communications Manager registers with a gatekeeper via H.323.
  D. A gatekeeper can enable CAC and AAR.
  E. A gatekeeper can enable CAC, but not AAR.
  C. Cisco Unified Communications Manager registers with a gatekeeper via H.323.
  E. A gatekeeper can enable CAC, but not AAR.

• Question 98:

  Which two statements describe RSVP-enabled locations-based CAC? (Choose two.)

  A. RSVP can be enabled selectively between pairs of locations.
  B. Using RSVP for CAC simply allows admitting or denying calls based on a logical configuration that is ignoring the physical topology.
  C. RSVP is topology aware, but only works with full mesh networks.
  D. An RSVP agent is a Media Termination Point that the call has to flow through.
  E. RSVP and RTP are used between the two endpoints.
  A. RSVP can be enabled selectively between pairs of locations.
  D. An RSVP agent is a Media Termination Point that the call has to flow through.

• Question 99:

  Refer to the exhibit.

  

  The exhibit shows centralized Cisco Unified Communications Manager configuration components for TEHO calls to U.S. area code 408 from the U.K. The PSTN access code for the

  A. K. is 9 and 001 for international calls to the U.S. What should the TEHO-US route list configuration consist of?
  B. First route group should point only to the U.K. gateway. The second route group should point to the
  C. S. gateway.
  D. First route group should be only the local route group. The second route group should point to the U.S. gateway.
  E. First route group should point only to the U.S. gateway. The second route group should be the local route group.
  F. The TEHO-US route list should contain only the local route group. The globalized configuration means that the appropriate gateway will be selected automatically.
  G. The \+! route pattern should point directly to the U.S. gateway.
  C. S. gateway.

• Question 100:

  Enabling authentication and encryption for CTI, JTAPI, and TAPI applications requires which two tasks? (Choose two.) (SourcE. Configuring Cisco IP Telephony Authentication and Encryption)

  A. Enter the encryption key into the application.
  B. Set up an IPsec association between the application and Cisco Unified CallManager.
  C. Configure related security parameters in the CTI, JTAPI, and TAPI application.
  D. Add the application user or end users to the Standard CTI Secure Connection user group, Standard CTI Allow Reception of SRTP Key Material user group, and Standard CTI Enabled user group.
  C. Configure related security parameters in the CTI, JTAPI, and TAPI application.
  D. Add the application user or end users to the Standard CTI Secure Connection user group, Standard CTI Allow Reception of SRTP Key Material user group, and Standard CTI Enabled user group.