Here is an interesting one that caused me to go digging into themoderate depths of DNS arcana:

; sdig ns just-dust.comdns1.name-services.com.dns2.name-services.com.dns3.name-services.com.dns4.name-services.com.dns5.name-services.com.; dig mx servidor134.just-dust.com[...];; [...] status: SERVFAIL

When you query an authoritative nameserver for a record that doesn'texist, what you get back is a reply with status NOERROR, the aa bit set, no ANSWER section, and the zone's SOA record asthe sole record in the AUTHORITY section. (And no ADDITIONAL section.)

When you query a nameserver for a record in a zone that it doesn'tserve, what you get back is a reply with status NOERROR, no ANSWERsection, some zone's NS records, and some

At least at one point, there were a lot of people who loudly couldn'tunderstand why C++ was still around as a going concern. After all,didn't Java have it beat hollow, as Java was a much more productiveobject oriented language to develop in?

Such people implicitly believe that that problem that built C++ is'building object oriented programs'; now that there was a well knownbetter solution to that problem, they couldn't see why C++ didn'