| ns1.usna.navy.mil. (192.190.229.99) | ns1.usna.navy.mil. (2001:480:230:3211::99) | ns2.usna.navy.mil. (192.190.229.100) | ns2.usna.navy.mil. (2001:480:230:3211::100) |
| Responsive over UDP | OK | OK | OK | OK |
| Responsive over TCP | OK | OK | OK | OK |
| Answers authoritatively (AA bit) | OK | OK | OK | OK |
| SOA serial consistent | OK | OK | OK | OK |
| SOA authority correct (NXDOMAIN) | OK | OK | OK | OK |
| SOA consistent (NXDOMAIN) | OK | OK | OK | OK |
| SOA authority correct (Empty Answer) | OK | OK | OK | OK |
| SOA consistent (Empty Answer) | OK | OK | OK | OK |
| EDNS capable | OK | OK | OK | OK |
| PMTU sufficient | | | | |
| Returns DNSKEY | | | | |
| Returns RRSIG | | | | |
| Returns NSEC/NSEC3 (NXDOMAIN) | | | | |
| Returns RRSIG covering NSEC/NSEC3 (NXDOMAIN) | | | | |
| Returns NSEC/NSEC3 (Empty Answer) | | | | |
| Returns RRSIG covering NSEC/NSEC3 (Empty Answer) | | | | |