SSCA RTP & Media Transport 3

Question 1

At what bitrate does the G.711 codec operate?

Accepted Answer

64 kbps

Answer

8 kbps

Answer

16 kbps

Answer

32 kbps

Question 2

What is the bitrate of the G.729 codec?

Accepted Answer

8 kbps

Answer

4 kbps

Answer

16 kbps

Answer

32 kbps

Question 3

What static RTP payload type number is assigned to G.711 μ-law (PCMU)?

Accepted Answer

0

Answer

8

Answer

9

Answer

18

Question 4

What security capabilities does SRTP add that standard RTP lacks?

Accepted Answer

Encryption and message authentication of media streams

Answer

Lower latency media delivery

Answer

Automatic codec negotiation

Answer

Automatic retransmission of lost packets

Question 5

What does DTMF stand for?

Accepted Answer

Dual-Tone Multi-Frequency

Answer

Digital Tone Modulation Format

Answer

Digital Transfer Media Framework

Answer

Distributed Telephony Media Function

Question 6

Which RFC originally defined the method for carrying DTMF telephone events as RTP payloads?

Accepted Answer

RFC 2833

Answer

RFC 2198

Answer

RFC 3261

Answer

RFC 4566

Question 7

What mechanism determines which audio codec is used during a SIP call setup?

Accepted Answer

The SDP offer/answer exchange within SIP signaling

Answer

RTCP Sender Report statistics exchanged mid-call

Answer

RTP SSRC negotiation between endpoints

Answer

The RTCP SDES packet listing codec preferences