Your company's DNS administrator is assessing the DNS zone records. She needs to verify the primary source of authoritative information for your domain's DNS zone. Which DNS record should she review for this purpose?
The Start of Authority (SOA) record should be reviewed as it indicates the primary source of authoritative information for the domain. The SOA record contains important information like the primary name server for the domain, email of the domain administrator, domain serial number, and several timers relating to refreshing the zone.