Cisco 642-437 Online Practice Questions and Exam Preparation

Cisco 642-437 Online Questions & Answers

• Question 251:

  What are two characteristics of a Cisco Unified Border Element? (Choose two.)

  A. It facilitates easy and cost-effective connectivity between independent VoIP service provider networks.
  B. It is referred to in the industry as a "session border controller."
  C. It can be an FXS port.
  D. It can be a IP phone in the network.
  A. It facilitates easy and cost-effective connectivity between independent VoIP service provider networks.
  B. It is referred to in the industry as a "session border controller."

• Question 252:

  Click and drag the type of call on the left to the type of voice port it applies to on the right.

  Select and Place:

  

  

  ---

  PBX to PBX connections can use T1 or E1 with CAS or PRI: PBX can connect to a network through T1 or E1 lines with channel associated signaling (CAS) or Primary Rate Interface (PRI) signaling.

  For off-net calls, the typical connection between the router and the PSTN is through FXO port.

  A local call just needs FXS ports so it is the only choice for this type of call.

  We can make on-net calls through FXS port (phone directly connected to the router) or FXO port (phone connected to a PBX). The “switch” here means that we can connect an IP phone through a switch and place on-net calls through Cisco

  Unified Communications Manager.

  A PLAR call can work with any type of signaling, including EandM, FXO, FXS interfaces.

• Question 253:

  Which two digit manipulation commands should you use in a POTS dial peer? (Choose two.)

  A. num-exp
  B. [no] digit-strip
  C. translation-profile
  D. voice translation-profile
  E. forward-digits
  B. [no] digit-strip
  E. forward-digits

• Question 254:

  Which command should you use to configure a T1 CAS trunk to use the most reliable line coding technique?

  A. linecoding ami
  B. linecode b8zs
  C. linecode ami
  D. linecoding b8zs
  B. linecode b8zs

• Question 255:

  Which three IOS commands are used by Cisco Unified Communications Manager Express for digit manipulations? (Choose three.)

  A. prefix digits
  B. session target
  C. forward-digit numbers
  D. num-exp match
  E. no dtmf-relay
  F. target session
  A. prefix digits
  C. forward-digit numbers
  D. num-exp match

• Question 256:

  What is the default encryption algorithm that is used by SRTP?

  A. DES
  B. RC4
  C. AES
  D. Blowfish
  C. AES