Which of the following terms describes an attempt to transfer DNS zone data?

A DNS zone transfer request (AXFR) is categorized as reconnaissance because an attacker uses it to retrieve the complete set of DNS resource records from a server, exposing hostnames, IP addresses, mail servers, and overall network topology. This passive or active information-gathering step is a precursor to targeted attacks and directly maps to network and service discovery reconnaissance techniques.

Encapsulation is the process of wrapping data with protocol headers as it traverses the OSI layers and has no relationship to DNS zone data collection.

Dumpster diving is a physical social engineering method involving searching discarded materials for sensitive information, not a network-based DNS attack technique.

Spam refers to unsolicited bulk email messages and is entirely unrelated to DNS zone transfer attempts.