The protocol this BackendService uses to communicate with
backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP
or GRPC. depending on the chosen load balancer or Traffic
Director configuration. Refer to the documentation for the load
balancers or for Traffic Director for more information. Must be
set to GRPC when the backend service is referenced by a URL map
that is bound to target gRPC proxy.
Values:
UNDEFINED_PROTOCOL (0):
A value indicating that the enum field is not
set.
GRPC (2196510):
gRPC (available for Traffic Director).
HTTP (2228360):
No description available.
HTTP2 (69079210):
HTTP/2 with SSL.
HTTPS (69079243):
No description available.
SSL (82412):
TCP proxying with SSL.
TCP (82881):
TCP proxying or TCP pass-through.
UDP (83873):
UDP.
UNSPECIFIED (526786327):
If a Backend Service has UNSPECIFIED as its
protocol, it can be used with any L3/L4
Forwarding Rules.
