Glossary
What is a CNAME Record?
A DNS alias that points a domain name to another domain name.
Use a CNAME when a subdomain should follow another hostname supplied by a service. Enter a domain name as the value, rather than an IP address or an address beginning with https://. After querying the record, check that the target name also resolves to the required address records.
Example
www.example.com. 3600 IN CNAME app.example.net. — Address resolution for www follows the name app.example.net.
Common issue
A CNAME is not an HTTP redirect; it does not change the browser address or URL path. Publishing a CNAME alongside other ordinary data records, such as A, at the same name creates a conflict.