TZ170 Network Security Appliance 5 x Gigabit LAN, 1 x Gigabit WAN 256 MB RAM and 16 MB Flash Memory Requires subscription TZ 215 Network Security Appliance 6 x Gigabit LAN, 1 x Gigabit WAN 512 MB RAM and 32 MB Flash Memory Requires subscription TZ350 Network Security Appliance 6 x Gigabit LAN, 1 x Gigabit WAN 512MB RAM and 32MB Flash Memory Requires subscription