Dns Exfiltration — CompTIA Network+ (N10-009) Practice Questions

DNS exfiltration is an attack technique in which an adversary encodes stolen data within DNS query and response messages to bypass network controls that may not inspect DNS traffic. Because DNS is a trusted, commonly allowed protocol, it can pass through firewalls that block other outbound channels. The Network+ exam addresses DNS exfiltration as part of network threat awareness, and candidates should understand why monitoring DNS query volumes and inspecting unusual subdomains are important detection controls.

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