SK0-003 · Question #280
Which of the following types of DNS records enables support for email?
The correct answer is B. MX. The MX (Mail Exchanger) DNS record type is specifically designed to identify mail servers responsible for a domain, enabling email delivery.
Question
Which of the following types of DNS records enables support for email?
Options
- AA
- BMX
- CPTR
- DAAAA
How the community answered
(19 responses)- A5% (1)
- B89% (17)
- D5% (1)
Why each option
The MX (Mail Exchanger) DNS record type is specifically designed to identify mail servers responsible for a domain, enabling email delivery.
An A record maps a domain name to an IPv4 address, primarily for host resolution, not directly for email routing.
An MX record specifies the mail server(s) that accept email on behalf of a domain and includes a preference value for routing, making it critical for the proper functioning of email services.
A PTR record performs reverse DNS lookup, mapping an IP address to a domain name, used for verification and logging, not for direct email routing.
An AAAA record maps a domain name to an IPv6 address, similar to an A record but for IPv6, and is not directly used for email routing.
Concept tested: DNS record types - MX record for email
Source: https://learn.microsoft.com/windows-server/networking/dns/record-types
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