问题
I want to check which TLS version client(Browser) is supporting currently.And which TLS version it wants to use. Is there any other way to check which TLS version a particular browser support.
回答1:
Almost all browsers can now support TLS 1.0. Other versions of TLS 1.1 and 1.2 depend much more of your Browser and its version.
I will recommend you to keep staying with TLS 1.0 except if you really need one of the new features...
回答2:
"wants to use" is typically the highest level it supports, failing back to lower levels as each is denied or not available from the server.
Wikipedia has a table here that describes support for various browsers. I would recommend using the best that both browser and server support as a general rule.
If you have specific concerns perhaps a new question that describes those concerns and gives use cases would be a good way to find guidance.
来源：https://stackoverflow.com/questions/19443469/checking-the-tls-version-in-browser-requests-to-https-connection