SSCA RTP & Media Transport

Question 1

What does RTP stand for?

Accepted Answer

Real-Time Transport Protocol

Answer

RTP stands for Real-Time Transport Protocol, defined in RFC 3550, and is used to deliver audio and video over IP networks.

Question 2

Which transport layer protocol does RTP primarily use?

Accepted Answer

UDP

Answer

RTP uses UDP because its low overhead and tolerance for occasional packet loss suits real-time media better than TCP's reliable, ordered delivery.

Question 3

Which RFC defines the RTP protocol?

Accepted Answer

RFC 3550

Answer

RFC 3550 defines RTP and its companion RTCP protocol, obsoleting the earlier RFC 1889.

Question 4

What is the purpose of the SSRC field in an RTP header?

Accepted Answer

It uniquely identifies the synchronization source of the stream

Answer

SSRC (Synchronization Source) is a randomly chosen 32-bit value that uniquely identifies a single RTP stream source within a session.

Question 5

What does the sequence number field in an RTP packet enable?

Accepted Answer

Detecting packet loss and reordering out-of-order packets

Answer

The sequence number increments by one for each RTP packet sent, allowing receivers to detect missing packets and resequence packets that arrive out of order.

(SSCA) Sip School Certified Associate Practice Test

(SSCA) Sip School Certified Associate Practice Test

SSCA RTP & Media Transport