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递归和反复查询

11月 24th, 2008 | 1 Comment | Posted in DNS | by finalbsd | 2 views |

recursion:递归，是一个name server在自己不能提供授权解析的前提下，代替resolver去向其他name server请求解析，待自己得到结果后，再将这个结果返回给local dns（resolver）。递归不一定就是直接向ro... Tags:

How do you expire a record from dnscache?

12月 6th, 2007 | No Comments | Posted in DNS | by admin | 117 views |

How do you expire a record from dnscache?
Aug 22nd, 2005 09:54
Paul Jarc, Paul Theodoropoulos, Brian Coogan,
Occasionally an A record (giving an IP address for a hostname) may change, but dnscache will still have an old IP address c...