twisted.internet.ssl.ProtocolNegotiationSupport(Flags) class documentationtwisted.internet.ssl
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      ProtocolNegotiationSupport defines flags which are used to indicate the level of NPN/ALPN support provided by the TLS backend.
| Class Variable | NOSUPPORT | There is no support for NPN or ALPN. This is exclusive with both NPN and ALPN. | 
  
| Class Variable | NPN | The implementation supports Next Protocol Negotiation. | 
| Class Variable | ALPN | The implementation supports Application Layer Protocol Negotiation. |