Delegating Subdomains
Even though you may not need to delegate parts of your domain just yet, it’s helpful to understand a little more about how the process of delegating a subdomain works. Delegation, in the abstract, involves assigning responsibility for some part of your domain to another organization. What really happens, however, is the assignment of authority for a subdomain to different name servers. (Note that we said “name servers,” not just “name server.”)
Your zone’s data, instead of containing information in the subdomain you’ve delegated, includes pointers to the name servers that are authoritative for that subdomain. Now if one of your name servers is asked for data in the subdomain, it can reply with a list of the right name servers to contact.
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