EDNS Client Subnet

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

EDNS Client Subnet is a DNS extension that allows a recursive DNS resolver to specify the network subnet for the host on which behalf it is making a DNS query. This is generally intended to help speed up the delivery of data from content delivery networks, by allowing better use of DNS-based load balancing to select a service address serving the content expected to be hosted at that domain name, when the client computer is in a different network location from the recursive resolver.[1] [2] The EDNS client subnet mechanism is specified in RFC 7871.

As of 2017, DNS resolution service providers supporting EDNS Client Subnet include OpenDNS and Google Public DNS.[3]

References[edit]

  1. ^ "How it works". A Faster Internet. Retrieved 2018-03-27.
  2. ^ "EDNS Client Subnet (ECS) Guidelines | Public DNS | Google Developers". Google Developers. Retrieved 2018-04-02.
  3. ^ "Which CDNs support edns-client-subnet?". Retrieved 2018-04-02.