[Last-Call] Genart last call review of draft-ietf-quic-applicability-14

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Reviewer: Ines Robles
Review result: Ready with Issues

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at

<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-quic-applicability-14
Reviewer: Ines Robles
Review Date: 2022-02-07
IETF LC End Date: 2022-02-07
IESG Telechat date: Not scheduled for a telechat

Summary:

This document discusses the applicability of the QUIC transport protocol,
focusing on caveats impacting application protocol  development and deployment
over QUIC.  The document is well written and clear.

I have one minor issue.

Major issues: None

Minor issues:

Section 2 on the sentence:

"While recent measurements have shown no evidence of a widespread,  systematic
disadvantage of UDP traffic compared to TCP in the Internet"

Statement of "no evidence of a widespread,  systematic disadvantage" may be
seen as misleading when the example is about networks that simply block UDP
traffic without considering other possible disadvantages, moreover when one of
the references specifically states the opposite "3% failure is a lot".
Additionally references are rather old (2016) materials. Suggestion for
avoidance of doubt:

"Measurements have shown 3-5% of networks blocking UDP, constituting a
disadvantage of UDP traffic compared to TCP in the Internet [Edeline16],
[Trammell16] [Swett16].  All applications running on top of QUIC must
therefore..."

Nits: None

Thanks for this document,
Ines.


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