Which of the following actions is recommended if using tunneling in Zscaler?

Using tunneling in Zscaler is a strategy designed to optimize and control internet traffic, especially for specific applications. When using this approach, the recommended practice is to avoid setting any forwarding PAC file. A PAC (Proxy Auto-Configuration) file can guide browsers on how to handle requests for specified URLs, which can introduce complexity when combined with tunneling.

In the context of tunneling, having a PAC file may lead to conflicts in how traffic is routed, potentially defeating the purpose of tunneling. Tunneling aims to create a direct link for certain traffic to enhance performance and security, and introducing a forwarding PAC can complicate that by specifying alternate routing paths.

Furthermore, the other choices either complicate the routing process or undermine the effectiveness of tunneling. For instance, enabling all proxy script options could lead to unnecessary traffic rerouting, while disabling traffic monitoring is counterproductive for maintaining visibility and control over the traffic being tunneled.

By keeping the configuration simple and avoiding a forwarding PAC file, administrators can ensure a more straightforward and efficient use of tunneling in Zscaler, preserving the benefits of direct traffic routing while minimizing potential issues.