Explanation/Reference:

Zero Trust is a security framework requiring all users, whether in or outside the organization's network, to be authenticated, authorized, and continuously validated for security configuration and posture before being granted or keeping access to applications and data. Zero Trust assumes that there is no traditional network edge; networks can be local, in the cloud, or a combination or hybrid with resources anywhere as well as workers in any location.
The Zero Trust model uses microsegmentation - a security technique that involves dividing perimeters into small zones to maintain separate access to every part of the network - to contain attacks.