The PA-7500 Series firewalls are high-performance modular firewalls designed for large enterprise environments. These multi-blade chassis leverages either AC or DC power, includes a TPM module for PAN-OS key storage and security, supports UEFI secure boot, and uses hot-swappable slot cards to allow for expansion as needs grow. There are a total of nine horizontally-oriented slots on the front of the chassis where you can install a Management Processing Card (MPC), multiple Network Processing Cards (NPCs), and multiple Data Processing Cards (DPCs). At least one MPC, NPC, and DPC are required for the firewall to operate. The back of the chassis has two vertically-oriented slots that can accommodate up to two Switch Fabric Cards (SFCs).