In computer security, a DMZ or demilitarized zone is a physical or logical subnetwork that contains and exposes an organization's external-facing services to an untrusted, usually larger, network such as the Internet. From Wikipedia
In Season 22, Episode 18, Hanna leaves lobbying to rejoin fieldwork, delivers updates on Callen, Anna, and Tennant, and hints at Hetty Lange's location in a DMZ.
