Enum SSL.Constants.ALPNProtocol Description Application Level Protocol Negotiation protocol identifiers. See also EXTENSION_application_layer_protocol_negotiation Constant ALPN_http_1_1 constant SSL.Constants.ALPN_http_1_1 Description RFC 7301 Constant ALPN_http_2 constant SSL.Constants.ALPN_http_2 Description RFC 7540 Constant ALPN_http_2_reserved constant SSL.Constants.ALPN_http_2_reserved Description RFC 7540 Constant ALPN_spdy_1 constant SSL.Constants.ALPN_spdy_1 Description RFC 7301 Constant ALPN_spdy_2 constant SSL.Constants.ALPN_spdy_2 Description RFC 7301 Constant ALPN_spdy_3 constant SSL.Constants.ALPN_spdy_3 Description RFC 7301 Constant ALPN_stun constant SSL.Constants.ALPN_stun Description RFC 7443 Constant ALPN_turn constant SSL.Constants.ALPN_turn Description RFC 7443