CREST Practitioner Security Analyst (CPSA) Practice

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What does the SOA record indicate in a DNS zone?

The primary domain name
The authoritative name server
The information on email exchange
The IP associated with the zone

The correct answer is: The authoritative name server

The SOA (Start of Authority) record plays a crucial role in DNS (Domain Name System) zone management. It indicates the authoritative name server for the DNS zone, meaning it specifies which server is the primary source of information for that zone. This record includes important details such as the primary name server's hostname, the email address of the person responsible for the DNS zone, the zone's serial number (used for tracking changes), and timing parameters. This allows secondary name servers to know where to pull the information from and also helps maintain synchronization between the servers. While primary domain name, email exchange information, and IP addresses are important components of a DNS setup, they are not defined by the SOA record specifically. The SOA serves as the essential reference point for the whole zone, making it vital for efficient domain name resolution and management.