Final answer:
DNS zone transfer is the correct option that describes a feature allowing a DNS server to synchronize its database with another DNS server's list of domain names, ensuring up-to-date and reliable DNS operations.
Step-by-step explanation:
DNS zone transfer is a DNS feature that lets a DNS server update its database with the list of domain names in another DNS server. When a secondary DNS server needs to be synchronized with the primary DNS server, a DNS zone transfer occurs. This process allows the secondary server to have an accurate and up-to-date copy of the DNS database. It is essential for maintaining redundancy and reliability in DNS operations.