What does using a CNAME achieve in DNS context?

• A. It creates an alias for a domain name that can be used instead of the canonical host
• B. It encrypts the hostname
• C. It blocks external access to the DLB
• D. It requires the DLB DNS to be updated by Mulesoft

Answer: (A)

A CNAME creates an alias in DNS. It maps one domain name to another canonical name, so when a resolver asks for the alias, it follows the alias to the target name and resolves that target’s A or AAAA record to get the IP address. This lets multiple domain names point to the same resource without duplicating IP records, and it’s easy to update where the resource lives by changing the canonical name’s own records.

Keep in mind you can’t mix a CNAME with other records for the same name, and at the zone apex (the root of a domain) a CNAME is typically not allowed. It doesn’t encrypt traffic, block access, or require involvement from Mulesoft or a specific load balancer to function.