How to tell a DNS no data reply from a lame delegation
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
嘉賓:陳寶瑩
The problem that built C++ (a thesis)
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'
我唯一的小把戲
成年人,你們才是人渣
The benefits of growing your toolbox
Although we weren't going to use our new gigabit backbone connection immediately, I wanted to check that we reallycould get something close to gigabit performance through it and thateverything was working smoothly. When you're doing network performancetesting, you really need to do it from a platform that you trust, sothat any slowness can be attributed to the stuff in the middle andnot to your end having issues.
As it happened, the most trustworthy machine for this was my officeworkstation. But since it was
宿命論
雖然這人無色無相,但我相信他每一句說話。
不要問我原因,我就是信任他,沒人可以質疑他。
當我仍在猶疑,該堅持還是放手,忽然間
新聞
要趕文。頂我都過去玩下先。
青年,或者寵物
One problem with distributed identity systems
From one perspective, using someone else's identity system sounds verynice. Imagine the convenience of being able to just use LiveJournal useraccounts on your site, or (for an example closer to home) a centraluniversity database of campus-wide accounts.
(Yes, I am conjoining 'identity' and 'authorization' here, because Ibelieve that it's what a lot of people do in practice when thinkingabout this sort of thing.)
The problem with this is that any time you use a