Cisco 642-437 Online Practice Questions and Exam Preparation

Cisco 642-437 Online Questions & Answers

• Question 241:

  At what point in a VoIP network are the existing class of service or differentiated services code point values considered valid and are used throughout the rest of the network?

  A. trust boundary
  B. marking boundary
  C. access layer
  D. distribution layer
  A. trust boundary

• Question 242:

  Which QoS technology ensures predictability for voice traffic, aiming to provide better throughput on low- speed Frame Relay links?

  A. header compression
  B. IP RTP Priority and Frame Relay IP RTP Priority
  C. RSVP
  D. low latency queuing
  E. FRF.12
  E. FRF.12

• Question 243:

  Drag and drop the appropriate call-signaling term to the correct box in the diagram to establish RSVFbased Call Admission Control between the two Cisco Unified Border Elements; Cisco UBEsi. Some options may be used more than once.

  Select and Place:

  

  

  ---

  The H.323 setup is suspended before the destination phone, triggered by the H.225 alerting message, starts ringing. The RSVP reservation is made in both directions because a voice call requires a two-way speech path and therefore bandwidth in both directions. The terminating gateway ultimately makes the CAC decision based on whether or not both reservations succeed. At that point the H.323 state machine continues either with an H.225 Alerting/Connect (the call is allowed and proceeds), or with an H.225 Reject/Release (call is denied). The RSVP reservation is in place by the time the destination phone starts ringing and the caller hears ringback. http://www.cisco.com/en/US/docs/ios/12_1t/12_1t5/feature/guide/dt4trsvp.html

  

• Question 244:

  Which type of delay is caused by the distance that signal must travel in fiber- or copper-based networks?

  A. handling delay
  B. processing delay
  C. serialization delay
  D. propagation delay
  D. propagation delay

• Question 245:

  What is the prerequisite for configuring Cisco AutoQoS VoIP on a Cisco catalyst switch?

  A. Configure correct bandwidth on all interfaces.
  B. Configure Cisco Express Forwarding.
  C. Configure trust boundaries.
  D. Cisco Discovery Protocol version 2.
  E. Configure the mls qos global configuration command.
  D. Cisco Discovery Protocol version 2.

• Question 246:

  The administrator has added a new ephone-dn and a new ephone to the Cisco Unified Communications Manager Express system, but the new phone will not register with the system. If other phones are operating properly, which of the following should the administrator do first to try to resolve the issue?

  A. Reboot the router.
  B. Remove the ephone, then re-add the ephone.
  C. Verify that the url authentication is configured for the correct authentication URL.
  D. Verify that the url services is configured to the correct URL for services.
  E. Enter the command no telephony-service, then enter telephony service in global configuration mode.
  F. Enter the command no create cnf-files, then enter create cnf-files under the telephony-service configuration.
  F. Enter the command no create cnf-files, then enter create cnf-files under the telephony-service configuration.

• Question 247:

  Which digit manipulation command should be used to globally expand local 4-digit extension numbers beginning with a 4 to a full telephone number starting with 1919555 when calling outbound?

  A. prefix 1919555
  B. num-exp 4... 19195554...
  C. num-exp 4... 1919555...
  D. prefix 19195554
  B. num-exp 4... 19195554...

• Question 248:

  Which type of North American Numbering Plan number code is used to designate a number for special purposes?

  A. easily recognizable codes
  B. carrier identification codes
  C. service codes
  D. Automatic Number Identification II digits
  A. easily recognizable codes

• Question 249:

  Which voice feature operates the same as a firewall on a data network?

  A. digit manipulation
  B. call coverage
  C. calling privileges
  D. call routing and path selection
  C. calling privileges

• Question 250:

  Which dial plan component is responsible for choosing the appropriate path for a call?

  A. endpoint addressing
  B. call route and path selection
  C. call coverage and path selection
  D. calling privileges
  A. endpoint addressing