System 2.0.0.0 4.0.0.0 System.Enum System.Flags To be added. Defines the possible versions of . Field 2.0.0.0 4.0.0.0 System.Security.Authentication.SslProtocols Specifies that either Secure Sockets Layer (SSL) 3.0 or Transport Layer Security (TLS) 1.0 are acceptable for secure communications Field 2.0.0.0 4.0.0.0 System.Security.Authentication.SslProtocols No SSL protocol is specified. Field 2.0.0.0 4.0.0.0 System.Security.Authentication.SslProtocols Specifies the SSL 2.0 protocol. SSL 2.0 has been superseded by the TLS protocol and is provided for backward compatibility only. Field 2.0.0.0 4.0.0.0 System.Security.Authentication.SslProtocols Specifies the SSL 3.0 protocol. SSL 3.0 has been superseded by the TLS protocol and is provided for backward compatibility only. Field 2.0.0.0 4.0.0.0 System.Security.Authentication.SslProtocols Specifies the TLS 1.0 security protocol. The TLS protocol is defined in IETF RFC 2246. Field 4.0.0.0 System.MonoTODO("unsupported") System.Security.Authentication.SslProtocols Specifies the TLS 1.1 security protocol. The TLS protocol is defined in IETF RFC 4346. Field 4.0.0.0 System.MonoTODO("unsupported") System.Security.Authentication.SslProtocols Specifies the TLS 1.2 security protocol. The TLS protocol is defined in IETF RFC 5246.