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---
title
:
426 Upgrade Required
slug
:
Web/HTTP/Status/426
---
{{HTTPSidebar}}
HTTP
**
`
426 Upgrade Required
`
**
클라이언트 에러 응답 코드는 서버가 현재 프로토콜을 사용하여 요청을 처리하는 것은
거부하지만 클라이언트가 다른 프로토콜로 업그레이드한 후에는 요청을 수행할 의향이 있음을 나타냅니다.
서버는 필요한 하나 이상의 프로토콜을 나타내기 위해 이 응답에 {{HTTPHeader("Upgrade")}} 헤더를 같이 보냅니다.
##
상태
```
http
426 Upgrade Required
```
##
예제
```
http
HTTP/1.1 426 Upgrade Required
Upgrade: HTTP/2.0
Connection: Upgrade
Content-Length: 53
Content-Type: text/plain
This service requires use of the HTTP/2.0 protocol
```
##
명세
{{Specifications}}
##
같이 보기
-
{{HTTPHeader("Upgrade")}}
-
{{HTTPStatus("101")}}
`
Switching Protocols
`
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