Which record type maps a host name to an IPv4 address?
Answer
A
Explanation
An **A record** maps a DNS host name to an IPv4 address. In the lab, `webserver.acme.local` is assigned `10.10.10.30`, which is an IPv4 address, so its forward mapping is an A record. An AAAA record is used for IPv6, a PTR record supports reverse mapping, and a CNAME creates an alias to another name. **Key takeaway:** Use A for name-to-IPv4 mappings and AAAA for name-to-IPv6 mappings.\n\n**Glossary:** **IPv4**: Internet Protocol version 4 addressing. **AAAA record**: A DNS record mapping a name to an IPv6 address. **PTR record**: A reverse mapping from address to name.
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