How is a Corporate LAN classified in terms of trust?

A Corporate LAN is classified as a Trusted Network because it typically includes systems and devices that are owned and managed by the organization. The devices on this network are presumed to have security measures in place, such as firewalls, intrusion detection systems, and access control protocols, which help to ensure the integrity and confidentiality of the data transmitted over the network.

The classification as a Trusted Network is essential for understanding the security posture of network segments, as it influences the security requirements and controls that need to be implemented. On a Trusted Network, communications can be less restrictive compared to Untrusted Networks, which may include external connections such as the internet or third-party networks where data is at a higher risk of being compromised.

In the context of the other classifications, an Untrusted Network would typically refer to environments where there is little to no security specifically applied, and Secure or Neutral Networks are not standard classifications recognized in the PCI DSS framework specifically concerning trust levels.