GCIA · Question #88
Ben works as a Network Administrator in Business Software Solutions Ltd. The company uses a Windowsbased operating system throughout its network. Ben finds the following mail exchange record on the…
The correct answer is D. It indicates part of the DNS configuration for the primary server to handle both IPV4 and IPV6 requests. An A record maps a hostname to an IPv4 address and an AAAA record maps it to an IPv6 address, together enabling dual-stack DNS resolution for the same host.
Question
Ben works as a Network Administrator in Business Software Solutions Ltd. The company uses a Windowsbased operating system throughout its network. Ben finds the following mail exchange record on the server:
max1.passguide.com. IN A 613.0.2.1 IN AAAA 4ffe:d00:1:1::88 Which of the following conclusions can Ben derive from this record?
Options
- AIt indicates the configuration of the POP3 server (max1) on the site passguide.com on how to
- BIt indicates the preference of the record.
- CIt indicates the configuration of the SMTP server (max1) on the site passguide.com on how to
- DIt indicates part of the DNS configuration for the primary server to handle both IPV4 and IPV6 requests.
How the community answered
(32 responses)- A6% (2)
- B9% (3)
- C3% (1)
- D81% (26)
Why each option
An A record maps a hostname to an IPv4 address and an AAAA record maps it to an IPv6 address, together enabling dual-stack DNS resolution for the same host.
A and AAAA records map hostnames to IP addresses and have no role in POP3 mail retrieval configuration, which requires MX records and separate mail client settings.
Preference values are numeric fields within MX records that indicate mail server priority - they do not appear in A or AAAA address records.
SMTP routing is configured via MX records, not A or AAAA records, so these address entries do not represent SMTP server configuration.
The A record (613.0.2.1) provides the IPv4 address and the AAAA record (4ffe:d00:1:1::88) provides the IPv6 address for max1.passguide.com. Together these constitute the DNS address configuration allowing the server to respond to both IPv4 and IPv6 queries. This is a standard dual-stack DNS setup, not a mail exchange record configuration.
Concept tested: DNS A and AAAA records for dual-stack IPv4 IPv6
Source: https://learn.microsoft.com/en-us/windows-server/networking/dns/dns-top
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