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List:       free-expression
Subject:    Re: RealPlayer + RTSP + Linux
From:       Lynn Winebarger <owinebar () free-expression ! org>
Date:       2000-01-24 16:57:27
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On Mon, 24 Jan 2000, jordi ros wrote:
> 
> (1) I read that G2 RealServer uses: Standard RTP or RealNetworks RDT or
> TCP-only. When is each one used and which of these am I using when I
> listen a radio station over the Internet?
   For Real's proprietary formats they'll use RDP.  I'm not sure about all
the others.

> (2) Can anybody give me the picture of the protocol stack layers for
> this scenario? (e.g. physical layer / link layer / ip / udp / rtsp)
   RTSP <-> RTP
    |        |
    TCP     UDP
     \       /
      \     /
       \   /
         IP 
   usually, though not necessarily.
   
> (3) if RTP is a transport layer, how is it related to UDP or TCP? Are
> they complementary?

    RTP is a data transport layer than runs over UDP or TCP
(implementation's choice, I believe).

Lynn

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