What is NOT an advantage of Stateful Inspection?

The option that is NOT an advantage of Stateful Inspection is No Screening above Network layer. Stateful Inspection is a firewall technology that inspects packets at all layers of the OSI model, from layer 3 (Network) to layer 7 (Application). Stateful Inspection provides screening above Network layer, such as checking TCP flags, sequence numbers, ports, and application protocols . The other options are advantages of Stateful Inspection, as it provides high performance, good security, and transparency for legitimate traffic.

References: Stateful Inspection Technology, Firewall Administration Guide