Cisco Certified Support Technician (CCST) NetworkingIP ServicesEasy
A network engineer is configuring a new DNS server for a small office. They want to ensure that when users type 'www.example.com', their internal server at 192.168.1.10 is resolved. Which type of DNS record is primarily used for mapping hostnames to IPv4 addresses?
- AMX record
- BA record
- CCNAME record
- DAAAA record
Show answer & explanationAnswer & explanation
Correct answer: B. A record
An A record (Address record) is the fundamental DNS record type used to map a hostname (like www.example.com) to its corresponding IPv4 address. This is essential for converting human-readable names into network-routable addresses.
Why the other options are wrong
- A. MX records specify mail exchange servers for a domain.
- C. CNAME records create aliases from one domain name to another.
- D. AAAA records map hostnames to IPv6 addresses.
DNS A Record
An A record, or Address record, is a core DNS resource record that maps a domain name to an IPv4 address. It's crucial for users to access websites and services by their names rather than numerical IP addresses.
- Maps hostname to IPv4 address.
- Most common DNS record type.
- Essential for basic web and service access.
Memory trick: A for Address, AAAA for four A's (IPv6).