Talk:Real-time Transport Protocol

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Contents 1 On the layer 2 capitals? 3 Usage? 4 Packet structure 5 mathmatecial section? 6 RTP...RTCP?

[edit] On the layer

On Wiki-Page: http://en.wikipedia.org/wiki/OSI_Model die RTP-Protocol is located on OSI-layer 4 (Transport) --> DoD-Layer 3 (together with UDP, TCP, DCCP, SCTP).

On this Wiki-Page the RTP is located in DoD-Layer 4 (Application Process).

In my opinion the latter is the correct one.

"RTP relies on the underlying protocol(s) to provide demultiplexing of RTP data and RTCP control streams." (RFC3550 67)

Since RTP itself does not supply any kind of multiplexing and it tranports RTCP (Monitoring and control QoS-paramters) it should not be assigned to layer 3.

How do you think about this?

A. Yes, I think you are right, definetely RTP, RTSP and RTCP do not belong to the transport level.

I have changed the category of these three protocols to category:application layer protocols. What OSI layer does the RSVP protocol have? Mange01 22:45, 20 November 2006 (UTC)

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I do not agree with the change at all. IP goes over ARP, and it does not make a 3rd layer protocol. RTP is obviously a Transport protocol (it is even its name!), but since it belongs to a new generation, it subdivides the 3rd layer in 2. But if you don't believe me, believe the RFC 3550 self in its 1.Introduccion:

Applications typically run RTP on top of UDP to make use of its multiplexing and checksum services; both protocols contribute parts of the transport protocol functionality.

Wikipedia does not "think", just know. Please revert the changes. 22-2-07

someone should really fix this,it made me look stupid in front of my employees and i have no idea how to fix this myself89.1.24.220 23:04, 28 June 2007 (UTC)

I agree. No speculation on what layer it operates is required when the RFC is quite explicit. There are many examples of multiple protocols operating at the same layer, 802.2 LLC or SNAP are layer 2 operating with 802.3 or 802.5 etc. Do not confuse the encapsulation with layer of functionality.

[edit] capitals?

shouldn't this page be at real-time transport protocol? --MarSch 10:40, 30 March 2006 (UTC)

Probably not, since the capitalisation of the page matches RTP, the common initialism (a.k.a. acronym). --AlastairIrvine 04:18, 9 May 2007 (UTC)

[edit] Usage?

What softwares and services are really using RTP? I suggest a section called Usage. Mange01 21:45, 3 December 2006 (UTC)

[edit] Packet structure

Perhaps this section should be split up using 3rd-level headings.

Also, I think the format for the timestamp should be given. Comments? --AlastairIrvine 04:20, 9 May 2007 (UTC)

[edit] mathmatecial section?

Is this paper really realavent? Sabalon 23:44, 20 June 2007 (UTC)

[edit] RTP...RTCP?

"It goes along with the RTCP and it's built on top of the User Datagram Protocol (UDP). Applications using RTP are less sensitive to packet loss, but typically very sensitive to delays, so UDP is a better choice than TCP for such applications."

Should it read "Applications using RTCP are less sensitive to packet loss"? This seems more typical to TCP. RTP over UDP seems to be less sensitive to delays. --Eric (talk) 00:39, 11 December 2007 (UTC)