TABLE 2 Firewall Appliance Hardware Features
Hardware	HP ProLiant DL320	Network Engines NS6400	RimApp TechnologyRoadBLOCK
CPU	4GHz/800MHz Intel Pentium 4 Processor, 1MB L2 cache	2.8GHz Pentium 4 Processor	3.20GHz Pentium 4 Processor, 1MB L2 cache
Memory	1GB	1GB	2GB DDR2, 533MHz SDRAM (2x1GB 533MHz)
Hard disk	80GB Serial ATA (SATA)	60GB ATA	2 x 120GB mirrored RAID 1 SATA 7200rpm (hot swappable)
PCI slots	2 PCI-X slots	No usable slots	1 PCI-X 100/66MHz slot
USB interfaces	Two internal, one front, and two back headers	Two rear headers	One internal and two external headers
System fans	Four dual-rotor fans	Three fans for CPU, one for power supply	Five system fans plus two power-supply fans
Front bezel features	Hard-disk and network-activity LEDs	Hard-disk and network-activity LEDs	System Server Infrastructure (SSI)-compliant front panel with hard-disk, network-activity, and system-fault LEDs