Hopefully simple question, but information on this specific scenario isn't easy to find based on technet and google searches, so here goes:
Let's say you have 2 sites defined in Active Directory, and each of these sites has a dozen or more subnets defined within them. What mechanism is used for a client to locate a DC for authentication if it lives on a subnet NOT defined in these two sites? I know that in theory it should be able to authenticate against any responding DC in the enterprise, but I can't remember what mechanism is used when the client is configured with an IP that is not defined in any site.
At one time, a long time ago, I seemed to remember something about determining the closest DC based on hop count. Is this true?
I've found lots of info on how sites work in AD, but less on how the exception computers (not in any site) locate a DC and authenticate.