3CR17660-91 | 3Com 4200G-12 Layer 3 Switch 1 x Expansion Slot 4 x SFP (mini-GBIC) Shared 12 x 10/100/1000Base-T LAN

Here are the technical specifications for the 3Com 4200G-12 Layer 3 Switch:

1. Form Factor: Desktop, Rack-mountable
2. Ports: 12 x 10/100/1000Base-T LAN, 4 x SFP (mini-GBIC) shared
3. Expansion Slot: 1 x Expansion Slot
4. Switching Capacity: 24 Gbps
5. Forwarding Rate: 17.9 Mpps
6. MAC Address Table Size: 8K entries
7. Routing Protocol: OSPF, RIP-1, RIP-2, IGMPv2, IGMP, DVMRP, PIM-SM, static IP routing, PIM-DM
8. Remote Management Protocol: SNMP 1, SNMP 2, RMON 1, RMON 2, Telnet, SNMP 3, HTTP, HTTPS, TFTP, SSH-2
9. Authentication Method: RADIUS, TACACS+, Secure Shell v.2 (SSH2)
10. Features: Layer 3 switching, DHCP support, VLAN support, IGMP snooping, Syslog support, DoS attack prevention, port mirroring, DiffServ support, manageable, MAC address filtering, Broadcast Storm Control, Multicast Storm Control, Unicast Storm Control, SNTP support, Spanning Tree Protocol (STP) support, Rapid Spanning Tree Protocol (RSTP) support, Multiple Spanning Tree Protocol (MSTP) support, Quality of Service (QoS), Jumbo Frames support, MLD snooping, DHCP relay, DHCP client, Dynamic ARP Inspection (DAI)

Helpful Notes:
1. This switch is a refurbished item, meaning it has been previously used and restored to its original condition.
2. The switch supports various routing protocols, making it ideal for complex network setups.
3. With its advanced features such as DoS attack prevention and storm control, this switch is a reliable choice for network security.