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28. Which of the following would be a reason that a customer would need to use STUN in their converged network implementation?

112. Which of the following is true about RSVP?

A. It is mostly used for small networks.

358. Which of the following codecs will provide the BEST mean opinion score (MOS) under good network conditions?

117. Which of the following layers of the OSI model provides error control across the entire network?

A. Physical layer

95. When implementing a converged network, traffic shaping is important because it:

A. maximizes the flow of data across a link in a forward direction.

237. Which of the following is a purpose of a gatekeeper?

A. Convert signals between transmissions.

212. Voice quality issues are reported between two remote sites that are connected via an IPSec VPN.  The technician believes that the service provider network may be the cause of voice quality issues, and asks the service provider for packet loss, jitter, and delay statistics of the voice calls.  Which of the following makes it impossible for the service provider to meet this request?

245. Which of the following is a primary benefit of PC softphones in a corporate environment?

A. Remote users have access to residential calls forwarded to their corporate locations

230. Which of the following features is used when a call is delivered to the Automatic Call Distributor (ACD) from the PBX and then distributed to the next available agent?

285. Which of the following statements is true about SIP security standards?

A. SIP can only use Transport Layer Security (TLS) for media encryption and SRTP for signaling encryption.