Cisco ASA 5520
 
Users/Nodes: Unlimited
Firewall Throughput: Up to 450 Mbps
Maximum Firewall and IPS Throughput with AIP-SSM-10: Up to 225 Mbps  
Maximum Firewall and IPS Throughput with AIP-SSM-20: Up to 375 Mbps
Maximum Firewall and IPS Throughput with AIP-SSM-40: Up to 450 Mbps
Integrated Network Ports: 4 Gigabit Ethernet, 1 Fast Ethernet
Virtual Interfaces (VLANs): 150
High Availability: Active/Active and Active/Standby
Expansion Slot: 1, SSM
User-Accessible Flash Slot: 1
USB 2.0 Ports: 2
Serial Ports: 2 RJ-45, console and auxiliary
Rack-Mountable: Yes
Wall-Mountable: Not available
Security Lock Slot (for Physical Security): Not available
Memory: 2 GB
Minimum System Flash: 256 MB