referring to the TCP protocol in Istio, this typically means we are treating it as a raw stream of bytes,
and not parsing application level protocols such as TLS or HTTP.</p><h2 id=traffic-routing>Traffic Routing</h2><p>When an Envoy proxy receives a request, it must decide where, if anywhere, to forward it to.
By default, this will be to the original service that was requested, unless <a href=/v1.12/docs/tasks/traffic-management/traffic-shifting/>customized</a>.
How this works depends on the protocol used.