opentelemetry uses TCP or UDP ?

[serj-maks]

hi! Which transport opentelemetry via http and opentelemetry via gRPC use: TCP or UDP? Otlp http doc says about TCP (this is only place, that talks about transport). Google says, what gRPC usually use TCP, but in otlp doc I couldn't find any info about it

[jack-berg]

Since the grpc is built on top of http/2, the grpc version of OTLP uses TCP. The http/protobuf version of OTLP uses http/2 or http/1.1 so it uses TCP as well.

[serj-maks]

thank you!