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8 changes: 8 additions & 0 deletions src/content/docs/ssl/troubleshooting/faq.mdx
Original file line number Diff line number Diff line change
Expand Up @@ -157,3 +157,11 @@ We recommend one of the following options:

* Change the Universal Certificate Authority to a different CA.
* Add an [advanced certificate](/ssl/edge-certificates/advanced-certificate-manager/) or [custom certificate](/ssl/edge-certificates/custom-certificates/) using a different CA.

***

## What is the HTTP version used for OCSP?

Our OCSP implementation uses HTTP/1.1 by default for plain HTTP connections.

For HTTPS connections, the client automatically attempts to use HTTP/2 if the server supports it through the TLS ALPN (Application-Layer Protocol Negotiation) extension. If HTTP/2 is not available or supported by the server, it will fall back to HTTP/1.1.
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