The valid SecureXL paths in R81.10 are F2F (Slow path), Accelerated Path, Medium Path, and F2V (Firewall to Virtual). SecureXL is a technology that enhances the performance of the Check Point Firewall by accelerating the throughput and processing of network traffic. The F2F path refers to the traditional firewall slow path. The Accelerated Path is used to speed up packet processing. The Medium Path (PXL) is used for packets that require a higher level of inspection but can still benefit from some acceleration. The F2V path is for traffic moving from the firewall to a virtual machine.