Major resource records (1/2)

SOA (Start of Authority) RR
mandatory RR for every zone
provides several configuration parameters
A (Address) RR
provides hostname to IPv4 address mapping
AAAA (IPv6 Address) RR
provides hostname to IPv6 address mapping
NS (name server) RR
specifies the name of nameserver
defines zone delegation
both parent and child maintain NS RRsets
parent's set must be a subset of (or equal to) child's set (cause "lame delegation" otherwise)