2 RJ-45 10/100 ports (IEEE 802.3u Type 100Base-T), 2 dl module slots, 1 Compact flash port, VPN encryption module slot, 500 Max VPN sessions, 1 RS-232C DB-9 console port. Stateful firewall, IPSec VPN (3DES-CBC, DES-CBC, AES-CBC, 128-bit, 192-bit a 256-bit. Hash algorithms SHA-1, MD5)802.1X supplicant, Management security, Access Control Lists (ACLs), Industry standard CLI, Link Layer Discovery Protocol (LLDP), Compact flash port, Dual flash images, Firewall and VPN wizards, Central Management, VoIP support(H.323 a SIP ), Layer 2/3/4 QoS Mechanisms, Scheduling Mechanisms, Policy and Shaping, IP routing protocols (RIP, RIPv2, OSPF, BGP4), VLAN, IP multicast, WAN Protocols (PPP, Frame Relay, IPSec, HDLC encapsulation, MLPPP, MLFR)