DISCONTINUED- No Replacement Available CISCO1721 - Cisco 1721 Router General Encryption Algorithm: Triple DES, IKE Routing Protocol: OSPF, HSRP, NHRP Flash Memory: 32 MB (installed) / 32 MB (max) RAM: 64 MB (installed) / 128 MB (max) Remote Management Protocol: SNMP, RMON, Telnet Authentication Method: RADIUS, PAP, CHAP, X.509 certificates, TACACS+ Data Link Protocol: Ethernet, Fast Ethernet Network / Transport Protocol: TCP/IP, L2TP, RSVP, IPSec, L2F Compliant Standards: IEEE 802.3, IEEE 802.3u, IEEE 802.1Q Device Type: Router Enclosure Type: Desktop - modular Status Indicators: Link activity, collision status, power Features: Modular design, full duplex capability, firewall protection, auto-sensing per device, IP-routing, DHCP support, NAT support, VPN support, auto-negotiation, VLAN support, traffic shaping, Stateful Packet Inspection (SPI), DoS attack prevention, manageable, Low-latency queuing (LLQ), Weighted Fair Queuing (WFQ), Access Control List (ACL) support Connectivity Technology: Wired MainSpecs Routing Protocol: OSPF, HSRP, NHRP Enclosure Type: Desktop - modular Remote Management Protocol: SNMP, RMON, Telnet Network / Transport Protocol: TCP/IP, L2TP, RSVP, IPSec, L2F Dimensions (WxDxH): 11.2 inch x 8.7 inch x 3.1 inch Weight: 2.6 lbs Features: Modular design, full duplex capability, firewall protection, auto-sensing per device, IP-routing, DHCP support, NAT support, VPN support, auto-negotiation, VLAN support, traffic shaping, Stateful Packet Inspection (SPI), DoS attack prevention, manageable, Low-latency queuing (LLQ), Weighted Fair Queuing (WFQ), Access Control List (ACL) support Power: AC 120/230 V ( 50/60 Hz ) Product Description: Cisco 1721 Modular Access Router - router - desktop Data Link Protocol: Ethernet, Fast Ethernet Compliant Standards: IEEE 802.3, IEEE 802.3u, IEEE 802.1Q Device Type: Router