如果域名指向一个IP，那么那个域名的cname也会指向那个IP？

Question

假设我有一个域 example.com，它指向一个 IP 111.11.11.1。如果我将新域 example2.com 命名为 example.com.

会不会也指向111.11.11.1？

Answer 1

根据https://www.cloudflare.com/learning/dns/dns-records/dns-cname-record/,

All CNAME records must point to a domain, never to an IP address. Imagine a scavenger hunt where each clue points to another clue, and the final clue points to the treasure. A domain with a CNAME record is like a clue that can point you to another clue (another domain with a CNAME record) or to the treasure (a domain with an A record).

所以它不会直接指向，把它指向指向IP的域名

Answer 2

CNAME 是别名：它指向另一个域名并将解析别名目标 IP，但您永远不会以明文形式看到 example2.com 指向 111.11.11.1。您可以查看例如 rfc1034 以获取更多信息：

For example, suppose a name server was processing a query with for USC-
ISIC.ARPA, asking for type A information, and had the following resource
records:

USC-ISIC.ARPA   IN      CNAME   C.ISI.EDU

C.ISI.EDU       IN      A       10.0.0.52

Both of these RRs would be returned in the response to the type A query,
while a type CNAME or * query should return just the CNAME.

如果域名指向一个IP，那么那个域名的cname也会指向那个IP？

If domain name points to an IP, then cname to that domain will also point to that IP?

dns

ip

cname