title

RFC 6891 - Extension Mechanisms for DNS (EDNS(0))

charset

utf-8

X-UA-Compatible

IE=edge

viewport

width=device-width, initial-scale=1

description

Extension Mechanisms for DNS (EDNS(0)) (RFC 6891, )

og:title

RFC 6891: Extension Mechanisms for DNS (EDNS(0))

og:url

https://datatracker.ietf.org/doc/html/rfc6891

og:site_name

IETF Datatracker

og:description

The Domain Name System's wire protocol includes a number of fixed fields whose range has been or soon will be exhausted and does not allow requestors to advertise their capabilities to responders. This document describes backward-compatible mechanisms for allowing the protocol to grow. This document updates the Extension Mechanisms for DNS (EDNS(0)) specification (and obsoletes RFC 2671) based on feedback from deployment experience in several implementations. It also obsoletes RFC 2673 ("Binary Labels in the Domain Name System") and adds considerations on the use of extended labels in the DNS.

og:type

article

twitter:card

summary_large_image

alternate

/feed/document-changes/rfc6891/

apple-touch-icon

https://static.ietf.org/dt/12.24.0/ietf/images/ietf-logo-nor-180.png

canonical

https://datatracker.ietf.org/doc/html/rfc6891

icon

https://static.ietf.org/dt/12.24.0/ietf/images/ietf-logo-nor-32.png

icon

https://static.ietf.org/dt/12.24.0/ietf/images/ietf-logo-nor-16.png