In SignalR, which transport method does it fall back to if WebSockets are not available?

  • Server-Sent Events (SSE)
  • Long Polling
  • WebRTC
  • gRPC
SignalR is a real-time framework for ASP.NET Core that supports various transport methods. When WebSockets are not available due to network restrictions or browser compatibility, SignalR falls back to Long Polling. Long Polling involves sending a request to the server, keeping it open until new data is available, and then responding.
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