DNS 解析器
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DNS 解析器是代表客户端执行递归 DNS 查找的软件或服务。当你在浏览器中输入 URL 时，解析器会依次联系多个 [[nameserver|域名服务器]]——从根服务器到 TLD 服务器再到权威服务器——以找到最终的 IP 地址。
示例
Google's public DNS resolver at 8.8.8.8 and Cloudflare's at 1.1.1.1 are popular alternatives to ISP-provided resolvers.