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4xx Client errors
Last updated Nov 19, 2024
What is HTTP Status Code 426? - Upgrade Required
Benjamin Bouchet
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The HTTP Status Code 426 means that the client should switch to a different protocol such as TLS/1.0, as given in the Upgrade header field.
Additional Links and Codes Related to Status Code What is HTTP Status Code 426?
102
Processing
412
Precondition Failed
431
Request Header Fields Too Large
407
Proxy Authentication Required
500
Internal Server Error
414
URI Too Long
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