Information systems may be protected by borders that separate internal assets from external assets. E.g. a firewall separates external world from internal assets. Borders are important defence elements where external attackers may be prevented from reaching internal assets. We need to identify zones, and connections between zones (aka interconnections)

Zone

A zone refers to a collection of assets that manage some information. It's crucial to safeguard the flow of information between zones to prevent unauthorized access or the transmission of malicious code.

Connection between zones

The interconnection between zones is facilitated by a set of devices designed to furnish comprehensive protection services for the information exchanges between the interconnected zones. Borders regulate information ingress and egress.

 

WARNING: physical zones are under revision.

 

Zone management is part of risk analysis.