Sticky Decision Function (SDF) is required to prevent which of the following?

 Sticky Decision Function (SDF) is required to prevent asymmetric routing in an Active-Active cluster. Asymmetric routing occurs when packets from a source to a destination follow a different path than packets from the destination to the source. This can cause problems with stateful inspection and NAT. SDF ensures that packets from the same connection are handled by the same cluster member1. References: Check Point R81 ClusterXL Administration Guide