l-selection/#automatic-protocol-selection>automatic protocol selection</a>
is enabled, Istio will automatically detect the protocol. Otherwise you should use the port name in the destination service to
<a href=/v1.21/docs/ops/configuration/traffic-management/protocol-selection/#explicit-protocol-selection>manually specify the protocol</a>.</p></li><li><p><strong>External outbound traffic</strong>
This is traffic leaving the sidecar to some external destination. Traffic can be forwarded as is, or a TLS conne