There are several protocol versions : SSL 2.0, SSL 3.0, TLS 1.0, TLS 1.1 and TLS 1.2. Internally, TLS 1.0/1.1/1.2 are SSL 3.1/3.2/3.3 respectively (the protocol name was changed when SSL became a standard).I assume that you want to know the exact protocol version that your browser is using.

SSL/TLS Client Security Test - BrowserLeaks The page shows the SSL/TLS capabilities of your web browser, determines supported TLS protocols and cipher suites, and marks if any of them are weak or insecure, displays a list of supported TLS extensions and key exchange groups. Using this data, it calculates the TLS-fingerprint in JA3 format. It also tests how your web browser handles requests for insecure mixed content. An Overview of TLS 1.3 - Faster and More Secure Jun 02, 2020 SSL Checker - Check server TLS/SSL setup and vulnerabilities Downgrade Attack Prevention (TLS_FALLBACK_SCSV) – There are currently five widely used version of SSL and TLS. Older versions such as SSL 2 and SSL 3 are known to be insecure. Also older TLS versions were already found vulnerable to various attacks. Servers commonly support more than one version of secure protocol in order to support all Choosing a minimum TLS version for a custom domain in API

Using Minimum TLS Version in Cloudflare SSL/TLS

The page shows the SSL/TLS capabilities of your web browser, determines supported TLS protocols and cipher suites, and marks if any of them are weak or insecure, displays a list of supported TLS extensions and key exchange groups. Using this data, it calculates the TLS-fingerprint in JA3 format. It also tests how your web browser handles requests for insecure mixed content. An Overview of TLS 1.3 - Faster and More Secure Jun 02, 2020

tls_protocol_version_TLSv12 Language: Language: Swift Objective-C API Changes: None; Enumeration Case tls _protocol _version _TLSv12. The TLS 1.2 protocol. Availability. iOS 13.0+ macOS 10.15+ Mac Catalyst 13.0+ tvOS 13.0+ watchOS 6.0+ Framework. Security; On This Page. Declaration See Also

The Transport Layer Security (TLS) protocol is the de facto means for establishing security on the Web. The newest version, TLS 1.3, improves efficiency and remedies the flaws and weaknesses Microsoft TLS 1.3 Support Reference | Premier Developer Jan 30, 2020 Transport Layer Security - Web security | MDN