GRPC

HTTP/2 solves head-of-line blocking at the application layer by multiplexing multiple streams over a single TCP connection. While HTTP/1.1 requires requests to be processed sequentially, HTTP/2 allows parallel processing through independent streams, each with its own ID. The Go standard library supports HTTP/2 out of the box when using HTTPS, and with some configuration, it can work over plain HTTP too

The net/rpc package in Go demonstrates basic RPC concepts by establishing TCP connections between clients and servers, using sequence numbers to match requests with responses, and supporting both gob (Go-specific) and JSON codecs for data serialization. While net/rpc is simpler and limited to Go services by default, gRPC offers advanced features like HTTP/2 streaming, cross-language support, and better performance