What are primary and secondary domains?
Generally, domain names are hosted on more than one name server. Hosted meaning the name to IP address mappings are stored on those servers… don’t confuse this with web site hosting, that’s a separate service entirely. DNS points the names to IP addresses, where a web site, or ftp, or e-mail server might be sitting. When a domain name is on multiple servers, one of the servers acts as a “Primary” or “Master” server. The other servers are then called “Slaves” or “Secondary” servers. The Primary server holds all the configuration information for the domain. Whenever changes need made, they are only made to the Primary server. The Slave’s pull information about the records off of the Primary server, keeping their records up to date. To the rest of the world, they look and act identically. It’s just a matter of what server holds all the configuration data. If Public-DNS just does secondaries for a domain, then someone else must have a master server configured out there with all the recor
