Domain name resolution

A recordThe IP address points to the IP address of the domain name.

Cname record: Alias points.

Set an alias for the host. Use this alias to access another host name.

MX record

Email Exchange records. It is used to direct an email ending with this domain name to the corresponding email server for processing. For example, if the email you use ends with the domain name mydomain.com, you must add the MX record of the domain name in the management interface to process all emails ending with @ mydomain.com.

NS records:

The domain name points to a record. There is a machine that resolves the domain name. The NS record takes effect only for the subdomain name. For example, if you want the server 12.34.56.78 to parse news.mydomain.com, you need to set the NS record of news.mydomain.com.

Understanding:

First, the domain name must point to the DSN server, that is, the NS record. Then, the NS server directs the record and cname record to the actual IP address.