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Difficulty: EasyDNS Infrastructure and Record Types

A network administrator needs to add a DNS entry that resolves the hostname `appserver.corp.local` directly to its assigned IPv6 address `2001:db8:85a3::8a2e:370:7334`. Which DNS resource record type must be configured for this resolution?

  1. AAAA recordAnswer
  2. B
    A record
  3. C
    CNAME record
  4. D
    MX record

Answer

An AAAA record is used to map a domain hostname directly to an IPv6 address.
An AAAA record (quad-A record) stores a 128-bit IPv6 address and maps it to a host domain name. To resolve hostnames to IPv6 destinations, DNS authoritative servers must be configured with AAAA records.

Step-by-Step Solution

1
Identify the required mapping
The scenario requires mapping a hostname (`appserver.corp.local`) to an IPv6 address (`2001:db8:85a3::8a2e:370:7334`).
Determining the network protocol version (IPv4 vs. IPv6) dictates the correct DNS record type.
2
Select the corresponding DNS record type
AAAA records are designated for 128-bit IPv6 address resolution.
Standard DNS taxonomy uses A records for IPv4 addresses and AAAA records for IPv6 addresses.

Key Concept

DNS IPv6 Host Mapping (AAAA Records)
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Topics

DNS Infrastructure and Record Types

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