What port does gRPC use?
Likewise, is gRPC a TCP or UDP?
Since gRPC uses HTTP/2, it can multiplex multiple RPCs on the same TCP connection. The Channel abstraction in gRPC lets gRPC make connection decisions without the application needing to be strongly-aware. By default, gRPC uses the "pick first" load balancing policy, which will use a single connection to the backend.
Besides, what protocol does gRPC use?
It uses HTTP/2 for transport, Protocol Buffers as the interface description language, and provides features such as authentication, bidirectional streaming and flow control, blocking or nonblocking bindings, and cancellation and timeouts. It generates cross-platform client and server bindings for many languages.
gRPC is built on top of HTTP/2 and HTTP/2 uses long-lived TCP connections.