What does the ZTunnel - Packet Filter Based mode primarily utilize?

The ZTunnel - Packet Filter Based mode primarily utilizes packet filters on the device it operates on. This mode allows for the identification and control of network traffic based on predefined criteria, leveraging the device's underlying operating system capabilities to apply security measures at the packet level.

By utilizing packet filters, ZTunnel can effectively monitor and manage the data flowing through the network, ensuring that only allowable traffic is permitted, while harmful or unwanted traffic is blocked. This approach enhances security by focusing on the packets themselves, establishing rules that specify which packets can pass through and which should be discarded, thereby maintaining the integrity and reliability of the network.

The other options do not accurately represent the core function of ZTunnel - Packet Filter Based mode. While TCP/IP headers are essential for routing information in general networking contexts, they do not encapsulate the functionality of ZTunnel as a packet filtering mechanism. Secure shell protocols pertain more to encrypted communication and do not directly involve packet filtering. Browser caching mechanisms, while relevant to performance optimization, do not relate to the core packet filtering capabilities that ZTunnel employs.