实现的注意事项

尽管 dns.lookup() 和各种 dns.resolve*()/dns.reverse() 函数具有将网络名称与网络地址相关联的相同目标（反之亦然），但它们的行为却大不相同。 这些差异可能会对 Node.js 程序的行为产生微妙但重要的影响。

Although dns.lookup() and the various dns.resolve*()/dns.reverse() functions have the same goal of associating a network name with a network address (or vice versa), their behavior is quite different. These differences can have subtle but significant consequences on the behavior of Node.js programs.