很久以來,看 yahoo blog 都沒法留言(包括對讀者的意見)。就算登入了 yahoo 帳號也做不到,因為我沒有開 yahoo blog。既然上堂要開 blog,也就當順水推舟好了。
作為一個寫 blog 寫了三年,連 blook 也出了的人,去上寫 blog 的課,是否有點胡鬧﹖
上堂的
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第八期《字花》
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第八期《字花》
Responses from DNS servers come with various useful and informativeflags. Since I just looked them up while figuring out just what wasgoing on with a peculiar nameserver , I'm goingto write it down for my future reference.
qr | Yes, this is really a DNS response that dig is printing. |
aa | The server is authoritative for the domain. |
rd | You asked for recursive resolution of your query. |
ra | The server is willing to do recursive queries foryou. |
tc | The response was truncated because it was toobig to |
This is one of those interesting little DNS glitches:
71後
SNS
Given my earlier entry that talked about OpenID's limitations , one might wonder what it's good for. There's anumber of good uses for it that I can think of: