The Domain Name System (DNS) is like the internet's phone book. It translates human-readable domain names (like example.com) into IP addresses that computers use to communicate with each other.
DNS 的工作原理：1你在浏览器中输入一个域名
2你的计算机向 DNS 服务器查询 IP 地址
3DNS 服务器返回对应的 IP 地址
4你的浏览器使用该 IP 地址连接网站
核心概念：TTL（生存时间）DNS 记录在刷新前被缓存的时间
名称服务器存储并服务域名 DNS 记录的服务器
DNS 记录DNS 中存储的不同信息类型（A、MX、CNAME 等）
DNS 传播DNS 变更传播到整个互联网所需的时间
公共 DNS 服务器：服务商主 DNS备用 DNSIPv6 DNS114DNS114.114.114.114114.114.115.115-DNSPod DNS+119.29.29.29182.254.116.1162402:4e00::DNS.SB (Telecom/Mobile)101.226.4.6218.30.118.6-DNS.SB (Unicom)123.125.81.6140.207.198.6-CNNIC DNS1.2.4.8210.2.4.8-Google DNS8.8.8.88.8.4.42001:4860:4860::8888Cloudflare DNS1.1.1.11.0.0.12606:4700:4700::1111IBM Quad9 DNS9.9.9.9149.112.112.1122620:fe::feDNS.SB185.222.222.222185.184.222.2222a09::OpenDNS208.67.222.222208.67.220.2202620:0:ccc::2V2EX DNS199.91.73.222178.79.131.110-Alibaba Cloud DNS223.5.5.5223.6.6.62400:3200::1Tencent Cloud DNS183.60.83.19183.60.82.98-Baidu Cloud DNS180.76.76.76-2400:da00::6666Microsoft DNS4.2.2.14.2.2.2-Huawei Cloud DNS122.112.208.1139.9.23.90-ByteDance DNS180.184.1.1180.184.2.2-OneDNS117.50.11.1152.80.66.66-Chunghwa Telecom DNS168.95.192.1168.95.1.1-Hong Kong Broadband DNS203.80.96.10203.80.96.9-Norton DNS199.85.126.10199.85.127.10-Oracle Dyn DNS216.146.35.35216.146.36.36-Credit Suisse DNS64.6.64.664.6.65.6-