312-50V9 · Question #542
A zone file consists of which of the following Resource Records (RRs)?
The correct answer is D. SOA, NS, A, and MX records. A DNS zone file is composed of standard resource records including SOA, NS, A, and MX records. AXFR is a query type used to request a zone transfer, not a resource record stored in a zone file.
Question
A zone file consists of which of the following Resource Records (RRs)?
Options
- ADNS, NS, AXFR, and MX records
- BDNS, NS, PTR, and MX records
- CSOA, NS, AXFR, and MX records
- DSOA, NS, A, and MX records
How the community answered
(50 responses)- A2% (1)
- B8% (4)
- C4% (2)
- D86% (43)
Why each option
A DNS zone file is composed of standard resource records including SOA, NS, A, and MX records. AXFR is a query type used to request a zone transfer, not a resource record stored in a zone file.
DNS is not a resource record type, and AXFR is a zone transfer query operation, not a record stored within a zone file.
DNS is not a valid resource record type, and while PTR records can exist in reverse lookup zones, they are not a standard component of a typical forward zone file.
AXFR is the DNS opcode for a full zone transfer request sent between servers, not a resource record type that resides in a zone file.
A zone file must begin with an SOA (Start of Authority) record that defines the primary name server and zone parameters. It also contains NS records listing authoritative name servers, A records mapping hostnames to IPv4 addresses, and MX records directing email delivery. These four record types form the core mandatory and common components of any valid zone file.
Concept tested: DNS zone file resource record types
Source: https://learn.microsoft.com/en-us/windows-server/networking/dns/manage/manage-resource-records
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