An engineer must send JSON encoded telemetry data to an external collector. The transport mechanism must prevent tampenng or forgery of the data. Which protocol accomplishes this goal?

GPB (Google Protocol Buffers) is a method of serializing structured data, not a transport protocol that provides security features like tamper prevention.

HTTP (Hypertext Transfer Protocol) is an application-layer protocol; while it can be secured with TLS (HTTPS), HTTP itself does not inherently prevent data tampering or forgery without an underlying security layer.

gRPC is a high-performance, open-source universal RPC framework; while gRPC often uses TLS for secure communication, gRPC itself is the RPC framework, not the specific transport security protocol that prevents tampering and forgery.

DTLS (Datagram Transport Layer Security) is a protocol that provides communication security for datagram-based applications, offering confidentiality, integrity, and authentication, which directly prevents tampering or forgery of telemetry data. It is particularly suitable for secure transmission of telemetry where UDP might be used.