no ip domain-lookup 关闭域名查询 ; 关闭域名查找
ip address lookup ip地址查找
dynamic IP routing lookup 动态IP路由查找
Reverse IP Lookup 反向IP查询
IP-lookup based on subtrie 基于子树的IP查找
multicast IP-routing lookup 组播路由查找
During login, a host may perform a reverse lookup on the IP address of the source address on the packets it receives.
在登录期间，主机可能会对它收到的数据包的源地址的IP地址执行反向查找。
The URL for the JNDI lookup on ADS is ldap://<<IP address of the machine that hosts ADS>>/<
ADS 中 JNDI 查找的 URL 是 ldap://<<IP address of the machine that hosts ADS>>/<<Base dn>>。
Reduce DNS lookups: Whenever a user types in a domain name in their web browser address field, the browser performs a DNS lookup to the IP.
减少DNS查找：只要用户在浏览器的地址栏中键入域名，浏览器总会执行dns查找IP地址，网站拥越多的入口位置，必要的DNS查找也会越多。
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