This signifies the networking tier used for configuring this address and can only take the following values: PREMIUM or STANDARD. Internal IP addresses are always Premium Tier; global external IP addresses are always Premium Tier; regional external IP addresses can be either Standard or Premium Tier. If this field is not specified, it is assumed to be PREMIUM.
value: 0 A value indicating that the enum field is not set.
value: 399530551 High quality, Google-grade network tier, support for all networking products.
value: 484642493 Public internet quality, only limited support for other networking products.