﻿<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>C++博客-Young's Blog-随笔分类-LearnNote</title><link>http://www.cppblog.com/Young/category/12838.html</link><description>包子铺</description><language>zh-cn</language><lastBuildDate>Fri, 01 Mar 2013 18:45:55 GMT</lastBuildDate><pubDate>Fri, 01 Mar 2013 18:45:55 GMT</pubDate><ttl>60</ttl><item><title>[TCP/IP] DNS Review 1</title><link>http://www.cppblog.com/Young/archive/2010/01/19/106000.html</link><dc:creator>Young</dc:creator><author>Young</author><pubDate>Tue, 19 Jan 2010 03:46:00 GMT</pubDate><guid>http://www.cppblog.com/Young/archive/2010/01/19/106000.html</guid><wfw:comment>http://www.cppblog.com/Young/comments/106000.html</wfw:comment><comments>http://www.cppblog.com/Young/archive/2010/01/19/106000.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cppblog.com/Young/comments/commentRss/106000.html</wfw:commentRss><trackback:ping>http://www.cppblog.com/Young/services/trackbacks/106000.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 1.DNS服务器之间的数据交换<br>    更新Primary服务器的配置文件后，Primary上的DNS服务会收到通知，重新加载配置文件。Secondary服务器一般会每隔一段时间（通常是 3个小时）后访问一下Primary服务器，如果Primary服务器有新的数据，则会进行 Zone Transfer来传递数据。<br><br>2.DNS服务器没有相应域名的数据<br>    这个时候DNS服务器必需要从其他的Authoritative DNS服务器中获取数据，不是所有的DNS服务器都知道这些Authoritative DNS服务器的地址&nbsp;&nbsp;<a href='http://www.cppblog.com/Young/archive/2010/01/19/106000.html'>阅读全文</a><img src ="http://www.cppblog.com/Young/aggbug/106000.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.cppblog.com/Young/" target="_blank">Young</a> 2010-01-19 11:46 <a href="http://www.cppblog.com/Young/archive/2010/01/19/106000.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>