Cisco 642-437 Online Practice Questions and Exam Preparation

Cisco 642-437 Online Questions & Answers

• Question 1:

  What is the maximum amount of one-way delay that is considered acceptable per G.114 for a voice call with little or no concern for quality issues?

  A. 200 ms
  B. 1 sec
  C. 150 ms
  D. 500 ms
  C. 150 ms

• Question 2:

  What is a Cisco Voice Gateway feature that enables class of service or calling privileges to be assigned?

  A. COR
  B. dial peer
  C. partition
  D. calling search space
  A. COR

• Question 3:

  Which command should you use to configure a dial-peer to support T.38 fax relay and to use Cisco fax relay if T.38 fails?

  A. fax protocol t38 fallback cisco
  B. fax t38 fallback cisco
  C. fax relay t38 cisco
  D. fax relay t38 backup cisco relay
  A. fax protocol t38 fallback cisco

• Question 4:

  What are the three acceptable values for one-way delay, jitter, and packet loss in a VoIP network? (Choose three.)

  A. 0-400 ms for delay
  B. 1 packet loss
  C. 20 ms for jitter
  D. 0-150 ms for delay
  E. 1 percent packet loss
  F. 30 ms for jitter
  D. 0-150 ms for delay
  E. 1 percent packet loss
  F. 30 ms for jitter

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  (http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoSIntro .html#wp46447)

• Question 5:

  Which QoS technology provides a strict priority queuing scheme that allows delay-sensitive data such as voice to be dequeued and sent before packets in other queues are dequeued, and also works with WFQ and CBWFQ.

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

• Question 6:

  Drag the appropriate IOS command from left and drop them in the spaces on the order to configure Cisco Unified Border Element. The ITSP does not support early offer. Not all boxes are used.

  Select and Place:

  

  

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  Configuring an IP IP Gateway:

  Call direction and translation section

  voice service voip - Enters VoIP voice-service configuration mode

  allow-connections from-type to to-type - Allows connections between specific types of endpoints in an Cisco Unified Border Element. Arguments are as follows:

  •

  from-type - Type of connection. Valid values: h323, sip.

  •

  to-type - Type of connection. Valid values: h323, sip. Main protocol section h323 call start interwork - Enables slow-start to fast-start interworking sip http://www.cisco.com/en/US/docs/ios/voice/cube/configuration/guide/vb-gw-config.html

• Question 7:

  What is the function of the command crypto pki trustpoint name when you are configuring Cisco Unified Border Element for SRTP-RTP Internetworking?

  A. It declares the trustpoint that the router uses and enters CA-trustpoint configuration mode.
  B. It specifies the key pair to associate with the certificate.
  C. It specifies the enrollment parameters of a CA.
  D. It obtains the certificate for the router from the CA.
  A. It declares the trustpoint that the router uses and enters CA-trustpoint configuration mode.

• Question 8:

  When a Cisco Unified Border Element is deployed to support RSVP-based CAC, which media flow method is required?

  A. RSVP-based CAC can be supported with either media flow-through or media flow-around if the Cisco Unified Communications Manager is configured as an RSVP agent.
  B. RSVP-based CAC only supports media flow-around.
  C. The Cisco Unified Border Element does not have to participate in the RSVP message exchange and will pass RSVP messages through unchanged using media flow-around.
  D. RSVP-based CAC requires Cisco Unified Border Element to use media flow-through.
  D. RSVP-based CAC requires Cisco Unified Border Element to use media flow-through.

• Question 9:

  Refer to the exhibit. When 5551234 is being matched with the outgoing dial peer that is shown in the exhibit, which of the following called numbers will be sent to the VoIP network?

  

  A. 5551234
  B. 1234
  C. 555
  D. Null
  E. 5
  F. 51234
  D. Null

• Question 10:

  An access layer switch is configured to extend priority to an IP phone. Cisco Discovery Protocol is enabled on all ports. What are the three possible ways that an IP phone can be instructed to treat the Layer 2 CoS priority value of the attached PC? (Choose three.)

  A. trusted IEEE 802.1Q
  B. configured DSCP level
  C. configured CoS level
  D. trusted
  E. configured IEEE 802.1Q
  F. untrusted
  C. configured CoS level
  D. trusted
  F. untrusted