Cisco CISCO2921-HSEC+/K9 | 2900 Series 2921 3 x Ports 1000Base-T + 12 x Expansion Slots 2U Rack-mountable Integrated Services Router

1. Dimensions: 43.8 cm x 43.8 cm x 4.5 cm
2. Weight: 8.6 kg
3. Processor: 1.2 GHz dual-core
4. RAM: 512 MB (upgradable to 2 GB)
5. Flash Memory: 256 MB (upgradable to 4 GB)
6. WAN Interface: 1-port Gigabit Ethernet, 1-port SFP, 1-port RJ-45
7. LAN Interfaces: 2-port Gigabit Ethernet, 1-port RJ-45
8. Expansion Slots: 3 EHWIC slots, 1 ISM slot, 1 SM slot, 1 USB slot, 1 USB console port
9. Power Supply: AC 120/230 V (50/60 Hz)
10. Routing Protocol: OSPF, IS-IS, BGP, EIGRP, DVMRP, PIM-SM, IGMP, GRE, PIM-SSM, static IPv4 routing, static IPv6 routing, policy-based routing (PBR), MPLS, VRF-aware IPSec
11. Security: Firewall, VPN support, SSL VPN, IPS, content filtering, identity management, intrusion prevention system (IPS), access control lists (ACLs), AAA, RADIUS, TACACS+
12. Management: SNMP, Telnet, SSH, CLI, HTTP, HTTPS, RMON, Syslog

Notes:
1. The Cisco 2921 router is ideal for small to medium-sized businesses looking for a reliable and secure networking solution.
2. With its expandable interface slots and upgradable memory, the router can easily adapt to changing business needs.
3. The router's advanced security features, including firewall and VPN support, ensure that your network is protected from potential threats.