Applicability of the QUIC Transport Protocol
draft-kuehlewind-quic-applicability-00

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Replaces draft-kuehlewind-quic-appman
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Network Working Group                                      M. Kuehlewind
Internet-Draft                                               B. Trammell
Intended status: Informational                                ETH Zurich
Expires: September 9, 2017                                March 08, 2017

              Applicability of the QUIC Transport Protocol
                 draft-kuehlewind-quic-applicability-00

Abstract

   This document discusses the applicability of the QUIC transport
   protocol, focusing on caveats impacting application protocol
   development and deployment over QUIC.  Its intended audience is
   designers of application protocol mappings to QUIC, and implementors
   of these application protocols.

Status of This Memo

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   This Internet-Draft will expire on September 9, 2017.

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   Copyright (c) 2017 IETF Trust and the persons identified as the
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Kuehlewind & Trammell   Expires September 9, 2017               [Page 1]
Internet-DraftApplicability of the QUIC Transport Protocol    March 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Notational Conventions  . . . . . . . . . . . . . . . . .   2
   2.  The Necessity of Fallback . . . . . . . . . . . . . . . . . .   3
   3.  Zero RTT: Here There Be Dragons . . . . . . . . . . . . . . .   3
   4.  Stream versus Flow Multiplexing . . . . . . . . . . . . . . .   4
   5.  Prioritization  . . . . . . . . . . . . . . . . . . . . . . .   4
   6.  Graceful connection closure . . . . . . . . . . . . . . . . .   5
   7.  Information exposure and the Connection ID  . . . . . . . . .   5
   8.  Use of Versions and Cryptographic Handshake . . . . . . . . .   5
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   10. Security Considerations . . . . . . . . . . . . . . . . . . .   5
   11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   6
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     12.1.  Normative References . . . . . . . . . . . . . . . . . .   6
     12.2.  Informative References . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   QUIC [I-D.ietf-quic-transport] is a new transport protocol currently
   under development in the IETF quic working group, focusing on support
   of semantics as needed for HTTP/2 [I-D.ietf-quic-http] such as
   stream-multiplexing to avoid head-of-line blocking.  Based on current
   deployment practices, QUIC is encapsulated in UDP and encrypted by
   default.  This means the version of QUIC that is currently under
   development will integrate TLS 1.3 [I-D.ietf-quic-tls] to encrypt all
   payload data and most header information.

   This document provides guidance for application developers that want
   to use the QUIC protocol without implementing it on their own.  This
   includes general guidance for application use of HTTP/2 over QUIC as
   well as the use of other application layer protocols over QUIC.  For
   specific guidance on how to integrate HTTP/2 with QUIC, see
   [I-D.ietf-quic-http].

   In the following sections we discuss specific caveats to QUIC's
   applicability, and issues that application developers must consider
   when using QUIC as a transport for their application.

1.1.  Notational Conventions

   The words "MUST", "MUST NOT", "SHOULD", and "MAY" are used in this
   document.  It's not shouting; when these words are capitalized, they
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