Which DNS record maps one domain to another as an alias?

Which DNS record maps one domain to another as an alias?

• A. A Record
• B. TXT Record
• C. CNAME Record
• D. MX Record

Answer: (C)

A DNS alias is created with a CNAME record, which maps one domain name to another domain name. This makes the first name an alias of the second, so queries for the alias are redirected to the canonical name and then resolved to an IP address. For example, you can set a CNAME so that www.example.com points to example.com (or to a CDN host). This is different from an A record, which directly maps a name to an IP address. TXT records store arbitrary text, often for verification, while MX records specify mail servers for a domain. Remember that you usually can’t attach other records to the same name as a CNAME, and apex domains have special considerations. But the essential idea is that a CNAME provides an alias from one domain to another.

A DNS alias is created with a CNAME record, which maps one domain name to another domain name. This makes the first name an alias of the second, so queries for the alias are redirected to the canonical name and then resolved to an IP address. For example, you can set a CNAME so that www.example.com points to example.com (or to a CDN host). This is different from an A record, which directly maps a name to an IP address. TXT records store arbitrary text, often for verification, while MX records specify mail servers for a domain. Remember that you usually can’t attach other records to the same name as a CNAME, and apex domains have special considerations. But the essential idea is that a CNAME provides an alias from one domain to another.