- IPv4_only - The test may only be deployed using the IPv4 internet protocol. This test may be deployed on any browser-capable site, including ones supporting IPv6.
- IPv6_only - The test may only be deployed using the IPv6 internet protocol. This test cannot be deployed to a Backbone node that does not support IPv6.
- IPv6_preferred - This is the default setting for all browser tests. A test provisioned as IPv6_preferred may be deployed to any node. If the test is deployed to an IPv6-capable node, the IPv6 internet protocol will be used on that node. If the node only supports IPv4, the IPv4 protocol will be used on that node.