GSLC · Question #267
Which of the following records is the first entry in a DNS database file?
The correct answer is B. SOA. The SOA (Start of Authority) record is always the first entry in a DNS zone file, defining authoritative information about the zone.
Question
Which of the following records is the first entry in a DNS database file?
Options
- AMX
- BSOA
- CCNAME
- DSRV
How the community answered
(22 responses)- A9% (2)
- B86% (19)
- C5% (1)
Why each option
The SOA (Start of Authority) record is always the first entry in a DNS zone file, defining authoritative information about the zone.
MX records define mail exchange servers for a domain and appear after the SOA record, not as the first entry.
The SOA record must appear as the first resource record in every DNS zone file; it contains the primary name server, responsible party email, and serial/refresh/retry/expire/TTL values that control zone replication and caching behavior.
CNAME records create canonical name aliases and are not the first entry in a zone file; they appear after the SOA and NS records.
SRV records specify service location data (host and port for specific services) and are not the first entry in a zone file.
Concept tested: DNS zone file structure and SOA record
Source: https://learn.microsoft.com/en-us/windows-server/networking/dns/zone-types
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