As a Next-Generation Firewall for mid-size organizations, the Dell™ Sonic WALL™ Network Security Appliance (NSA) 4600 delivers security & performance without compromise. Coupled with Dell’s patented 1 Reassembly-Free Deep Packet Inspection (RFDPI) single-pass threat prevention engine, all Dell Sonic WALL Next-Generation firewalls provide industry leading protection, performance, & scalability with the highest number of concurrent connections, lowest latency, no file size limitations & superior connections per second in their class.