NS Recordlists nameservers for the zone
Occurs in two places for every zone
Should agree with parent zone (common mistake #1)
Should agree with the servers (common mistake #2)
Advanced hint:
- ìGlueî records may be needed for names in same domain.
- Nameservers need ìAî records at the higher level.
- opus1.com. in ns ns.opus1.com.