##  External links  [  [ edit
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  * [ Headers: Permanent Message Header Field Names ](https://www.iana.org/assignments/message-headers/message-headers.xml#perm-headers%7CMessage)
  * RFC [ 6265 ](https://datatracker.ietf.org/doc/html/rfc6265) : IETF HTTP State Management Mechanism 
  * RFC [ 9110 ](https://datatracker.ietf.org/doc/html/rfc9110) : HTTP Semantics 
  * RFC [ 9111 ](https://datatracker.ietf.org/doc/html/rfc9111) : HTTP Caching 
  * RFC [ 9112 ](https://datatracker.ietf.org/doc/html/rfc9112) : HTTP/1.1 
  * RFC [ 9113 ](https://datatracker.ietf.org/doc/html/rfc9113) : HTTP/2 
  * RFC [ 9114 ](https://datatracker.ietf.org/doc/html/rfc9114) : HTTP/3 
  * RFC [ 7239 ](https://datatracker.ietf.org/doc/html/rfc7239) : Forwarded HTTP Extension 
  * RFC [ 7240 ](https://datatracker.ietf.org/doc/html/rfc7240) : Prefer Header for HTTP 
  * [ HTTP/1.1 headers from a web server point of view ](http://www.and.org/texts/server-http)
  * [ Internet Explorer and Custom HTTP Headers - EricLaw's IEInternals - Site Home - MSDN Blogs ](http://blogs.msdn.com/b/ieinternals/archive/2009/06/30/internet-explorer-custom-http-headers.aspx)

  

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