What is the purpose of DNS and how do A, AAAA, CNAME, and MX records differ?

• A. DNS translates domain names to resources; A maps to IPv4, AAAA to IPv6, CNAME aliases one name to another, MX directs mail to mail servers
• B. DNS translates IP addresses to domain names only; A maps to IPv6, AAAA to IPv4, CNAME is a mail server type, MX resolves hostnames to IP
• C. DNS provides encryption for web traffic; A, AAAA, CNAME, MX are all the same
• D. DNS assigns dynamic addresses to clients; A, AAAA, CNAME, MX are routing protocols

Answer: (A)