What type of traffic should a guest network be isolated from in a custom security zone?

Isolating guest network traffic from trusted or optional networks is crucial for maintaining the security and integrity of an organization's internal resources. Guest networks are typically designed to provide internet access for visitors without granting them access to sensitive information or systems within the organization. By keeping guest traffic separate from trusted networks, the risk of unauthorized access to internal systems is significantly reduced. This isolation minimizes potential vulnerabilities that could be exploited by a guest user, ensuring that any devices connected to the guest network cannot communicate with or affect the devices on trusted networks.

Maintaining this segregation also helps in applying specific security policies and monitoring for unusual activities on the guest network without impacting internal operations. While isolating traffic from other guest networks may also be an important consideration, the primary concern during guest network setup is often preventing access to trusted internal resources.