Code change:
Various HTTP versions have been used for media delivery.  HTTP/1.0, HTTP/1.1 and HTTP/2 are carried over TCP, and TCP's transport <del> behavior is described in tcp-behavior.  HTTP/3 is carried over QUIC, and QUIC's transport behavior is described in quic-behavior. </del> <ins> behavior is described in reliable-behavior.  HTTP/3 is carried over QUIC, and QUIC's transport behavior is described in quic-behavior. </ins> Unreliable media delivery using RTP and other UDP-based protocols is <del> also discussed in ultralow, udp-behavior, and hop-by-hop-encrypt, but it is difficult to give general guidance for these applications.  For instance, when packet loss occurs, the most appropriate response may depend on the type of codec being used. </del> <ins> also discussed in ultralow, unreliable-behavior, and hop-by-hop- encrypt, but it is difficult to give general guidance for these applications.  For instance, when packet loss occurs, the most appropriate response may depend on the type of codec being used. </ins> 3.

Related discussion:
text: I'm also moving one paragraph into the formerly-TCP section from Section 6, because it is specific to ABR strategies that assume a reliable transport. More news to come, when I create a PR for this issue ...
We think is now mergrable. Reviewer: Michael Scharf Review result: Ready with Issues This document has been reviewed as part of the transport area review team's ongoing effort to review key IETF documents. These comments were written primarily for the transport area directors, but are copied to the document's authors and WG to allow them to address any issues raised and also to the IETF discussion list for information. When done at the time of IETF Last Call, the authors should consider this review as part of the last-call comments they receive. Please always CC EMAIL if you reply to or forward this review. This informational document surveys network and transport protocol issues that affect quality of experience for streaming applications, in particular video. The overview covers many topics across different technologies. Readers may only be familiar with a subset of these topics and could therefore learn quite a bit from this kind of tutorial. Nonetheless, it remains somewhat unclear what the actual objective of some of the text is. For some topics, quite a bit of technical background is provided, but the discussion is not really comprehensive. In many sections, the document neither derives technical challenges, nor system/protocol requirements, nor practical usage guidance. It is just a kind of tutorial. Quite a bit of text also presents ongoing IETF work, and an RFC with this scope may thus get outdated soon. Section 6.2 deals with topics owned by TCPM. In similar past documents, I have asked for a TCPM presentation prior to an IETF last call in order to ensure that owners of running code are in the loop. I believe this strategy has worked well in the past. Having said this, as TSV-ART reviewer I don't strongly disagree with a publication. All these issues may just be OK for an informational RFC. Some more specific comments: Section 3.2.1. Recognizing Changes from an Expected Baseline This section apparently assumes relatively static path properties, e.g., fixed network connectivity. It would be more useful to analyze the impact of Wifi and 4G/5G networks in one place.