Maintain policy enforcement at the edge without compromising availability. The Palo Alto Networks PA-3420 is built for enterprise perimeter and segmentation deployments where uptime matters as much as inspection depth. Redundant AC power supplies help preserve service continuity if a power path fails, while the included rack mount kit supports clean installation in a four-post 19-inch rack. With 10 Gigabit Ethernet connectivity, the PA-3420 is suited to high-throughput environments that need consistent performance across critical traffic flows. Its 4U chassis provides the physical capacity expected in serious infrastructure deployments, making it a practical fit for data center edge protection, campus aggregation, and security zones that carry business-critical applications. For teams comparing appliances on more than headline throughput, this model stands out for the operational details that reduce risk: redundant power, rack-ready hardware, and a platform designed to sit in front of demanding workloads. It is the kind of firewall you deploy when downtime, not just packet loss, is the real cost.