Which network is referred to as a 'trusted network'?

A 'trusted network' typically refers to a network where the organization can enforce security measures and controls, ensuring a higher level of protection against unauthorized access and data breaches. A corporate LAN (Local Area Network) is considered a trusted network because it is usually within the organization’s controlled environment.

In a corporate LAN, the organization installs security protocols, such as firewalls and intrusion detection systems, and can manage user access rights efficiently. This environment allows for monitoring and maintaining data security, which is essential for protecting sensitive information, especially in the context of handling payment card information as stipulated by PCI DSS guidelines.

In contrast, options like a public Wi-Fi hotspot and an internet café are examples of untrusted networks. These environments are open to the public, making it easy for unauthorized users to intercept and access data transmitted over the network. A testing environment, while it may be controlled, can also be deemed untrusted if it does not have the same level of security or monitoring in place as a corporate LAN. Thus, the corporate LAN is clearly identified as the trusted network due to its security controls and management capabilities.