The type of address to reserve, either INTERNAL or EXTERNAL.
If unspecified, defaults to EXTERNAL.
Values:
UNDEFINED_ADDRESS_TYPE (0):
A value indicating that the enum field is not
set.
EXTERNAL (35607499):
A publicly visible external IP address.
INTERNAL (279295677):
A private network IP address, for use with an
Instance or Internal Load Balancer forwarding
rule.
UNSPECIFIED_TYPE (53933922):
No description available.