Skip to main content
  • New Internet Architecture Board, IETF Trust, IETF LLC and Internet Engineering Task Force Leadership Announced

    Members of the incoming Internet Architecture Board (IAB), the IETF Trust, the IETF Administration LLC (IETF LLC) Board of Directors, and the Internet Engineering Steering Group (IESG)—which provides leadership for the Internet Engineering Task Force (IETF)—have been officially announced, with new members selected by the 2021-2023 IETF Nominating Committee.

      13 Feb 2023
    • Informing the community on third-party correspondence regarding the W3C

      In accordance with our policy of transparency, this blog post is being published in order to keep the community informed about recent correspondence with lawyers acting on behalf of the Movement for an Open Web.

      • Lars EggertIETF Chair
      8 Feb 2023
    • Six Applied Networking Research Prizes Awarded for 2023

      Six network researchers have received Internet Research Task Force Applied Networking Research Prize (ANRP), an award focused on recent results in applied networking research and on interesting new research of potential relevance to the Internet standards community.

      • Grant GrossIETF Blog Reporter
      9 Jan 2023
    • Travel grants allow Ph.D. students to participate at IETF meeting in-person

      Sergio Aguilar Romero and Martine Sophie Lenders, both Ph.D. students in technology fields, attended and participated in the IETF 115 meeting in London with assistance through travel grants from the Internet Research Task Force.

      • Grant GrossIETF Blog Reporter
      7 Jan 2023
    • Impressions from the Internet Architecture Board E-Impact Workshop

      The IAB ran an online workshop in December 2022 to begin to explore and understand the environmental impacts of the Internet. The discussion was active, and it will take time to summarise and produce the workshop report – but the topic is important, so we wanted to share some early impressions of the outcomes.

      • Colin PerkinsIAB Member
      • Jari ArkkoIAB Member
      6 Jan 2023

    Filter by topic and date

    Filter by topic and date

    IETF updates HTTP specifications, publishes HTTP/3

    • Grant GrossIETF Blog Reporter

    24 Jun 2022

    The IETF has been busy working on updates to the specifications that make up HTTP, one of the most widely used protocols on the Internet, and documenting them in several RFCs published this month.


    IETF participants have been updating both the core specifications to HTTP, affecting all versions of the protocol, and they have been developing HTTP/3, the latest version of the protocol. The entire definition of HTTP has been revised, with definitions for HTTP/1.1, HTTP/2, and HTTP/3 either revised or new.

    With the changes, “the definition of HTTP is now clearer and better than ever,” said Tommy Pauly, co-chair of the HTTP Working Group.

    These updates to HTTP’s core specifications were published on June 6.

    The HTTPbis Working Group has rearranged HTTP specification documents into multiple parts, Mark Nottingham, co-chair of the group wrote in a blog post. The new documents update specifications for HTTP semantics [RFC9110], covering core, versionless semantics; HTTP caching [RFC9111]; and HTTP/1.1 [RFC9112], including everything that’s specific to version of the protocol.

    Revisions of HTTP/2 and the new HTTP/3 were also published, with both relying on the first two documents, RFC9110 and RFC9111, Nottingham said.

    During its revisions, the HTTP Working Group also fixed more than 475 issues with the HTTP protocols, he added. In many cases, the issues covered clarifications of the text, but other changes fixed security and interoperability issues, Nottingham wrote.

    Meanwhile, HTTP/3, standardized in RFC 9114 published this month, is focused on fixing some issues with HTTP/2.

    HTTP/2 addressed head-of-line blocking in the application layer protocol, but that exposed head-of-line blocking in the underlying transport protocol, TCP, Nottingham said. “QUIC was developed to address this, and HTTP/3 is HTTP over QUIC,” he said in an email.

    HTTP/3 also can help make Internet browsing faster. “In networks that are experiencing loss, its performance is much more stable, with significant improvements on long-tail networks,” Nottingham said.

    Even before the RFCs were published, as of May 2022, HTTP/3 was supported by browsers used by more than 72 percent Web users and is on track to match or exceed adoption and use of previous version. As of June, HTTP/3 already was used by 25 percent of the top 10 million websites, according to W3Techs. By comparison, after HTTP/2 was introduced in May 2015, nearly all browsers supported it by the end of the year, however less than 50 percent of the top websites use HTTP/2 currently.

    Share this page