云解析 DNS

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文档中心云解析 DNS 操作指南各记录类型的设置方法各记录类型说明及规则

各记录类型说明及规则

最近更新时间：2023-09-20 10:27:21

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本页目录：

各记录类型使用目的
各记录类型冲突规则

各记录类型使用目的
记录类型
使用目的
A 记录
将域名指向一个 IP 地址（外网地址）。
CNAME 记录
将域名指向另一个域名，再由另一个域名提供 IP 地址（外网地址）。
MX 记录
设置邮箱，让邮箱能收到邮件。
NS 记录
将子域名交给其他 DNS 服务商解析。
AAAA 记录
将域名指向一个 IPv6 地址。
SRV 记录
用来标识某台服务器使用了某个服务，常见于微软系统的目录管理。
TXT 记录
对域名进行标识和说明，绝大多数的 TXT 记录是用来做 SPF 记录（反垃圾邮件）。
隐、显性 URL 记录
将一个域名指向另外一个已经存在的站点。
各记录类型冲突规则
说明
冲突 
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 ：相同主机记录、相同线路，不同记录类型只能创建一条。例如，已有 www 的默认路线 A 记录，则不允许再添加 www 的默认路线 CNAME 记录。
可多条 
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 ：相同主机记录、相同线路、相同记录类型，可创建多条记录。例如，已有 www 的默认路线 A 记录，还可添加 www 的默认路线 A 记录。
不冲突 
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 ：相同主机记录、相同线路，不同记录类型可以共存。例如，已有 www 的默认路线 A 记录，还可添加 www 的默认路线 MX 记录。
云解析 DNS 针对同时添加 CNAME 与 TXT 相同的主机记录已进行优化处理，并在已知可能影响正常解析的情况下，允许您进行添加，如使用此方式造成的解析质量问题，腾讯云不做服务等级协议（SLA）保障。
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