Apps Http2 server will not reject Http1.1 as well?

[Bee Torika]

Hi

My android app connect server by http2 protocol, because a server can receive and response with that protocol.

If my old version apps connect with that server by http1.1 , it will be ok too?

Is that depend on a server ?
or
Almost a server deal with http 2.0 can deal with http1.1 DEFUALTly ?
(Just like newer android version can deal with old version app as well with default)

Thanks

 

[Deleted User]

I'd be extremely surprised if a server providing http2 did not also support http1.1. If this were not the case, then legacy web apps would stop working.
It depends what version is sent by the client, in either case the server can respond with the correct protocol version