Unit 2 · GG21 · DNS

Zone delegation: handing over a branch of the tree

Whoever controls a zone can hand over any branch that hangs from it. Delegating means writing two records in your zone (an NS and its glue) and no longer answering for anything below.

Name tree and zones each colour is a zone: what one authoritative server answers for

    Zone files
    Inside a single zone Zone cut: the parent keeps an NS and its glue Zone apex (where its SOA and NS live) Host (A record)