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Recap: RRs and RRsets
nResource Record:
uname  TTL class   type rdata
Fwww.ripe.net. 7200 IN A 192.168.10.3
n
nAll RRs of a given name, class, type make an RRset:
Fwww.ripe.net. 7200 IN A 192.168.10.3
F A 10.0.0.3
nIn DNSSEC the RRsets are signed, not the individual RRs
Also see RFC 2181 section 5: http://www.ietf.org/rfc/rfc2181.txt

Following slides show RR in detail
The bits are as they appear Ôon the wireÕ
The text is as the RR would appear in a zone file