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DNS预解析是浏览器试图在用户访问链接之前解析域名
X-DNS-Prefetch-Control:on|off
on
off
<meta http-equiv="x-dns-prefetch-control" content="off">
<!-- 打开DNS预解析 --> <meta http-equiv="x-dns-prefetch-control" content="no"> <!-- 强制查询特定主机名 --> <link rel="dns-prefetch" href="//sugarat.top">