The internet runs on protocols that most people never think about. DNS, the Domain Name System, is one of them. It quietly powers everything from checking your email to streaming your favorite show.

The Address (A) record associates a domain name or subdomain with an IP address, which is the primary purpose of the DNS system. The @ sign identifies "this domain;" for example, A @ nnn.nnn.nnn.nnn ...

Finally, a site-specific SRV record is entered into the DNS database for the domain in the site that previously had no coverage. From that point forward, any client in the DC-less site will query DNS ...