HTTP

Tag

Upgrade

2 resources tagged Upgrade across methods, status codes, headers, cookies, guides, and glossary.

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HTTP Status Codes

101 Switching Protocols

The server is switching to a different protocol as requested by the client. Learn about WebSocket upgrades and protocol negotiation.

 HTTP Status Codes

426 Upgrade Required

The server refuses to perform the request using the current protocol and requires the client to upgrade to a different protocol.