Certified Information Systems Security Professional (CISSP) Practice Exam

A 'trusted' network in cybersecurity refers to a network that has been established with verified entities, meaning that the users and devices connected to the network are known and authorized. It typically includes security measures such as authentication protocols, encryption, and monitoring to ensure that the data transmitted over this network remains secure and confidential.

This concept is crucial in cybersecurity as it helps in reducing the risk of unauthorized access, data breaches, and other security threats. A trusted network is often used for sensitive communications and operations, where the integrity and confidentiality of the information must be maintained.

The other options do not encompass the characteristics of a trusted network. Networks with public access or those intended solely for guest access often lack the robust security measures in place to verify user identities and protect sensitive information. Thus, they do not meet the criteria for being considered 'trusted'.