Cisco CISCO2821-HSEC/K9 | 2800 Series 2821 2 x Ports 1000Base-T + 11 Expansion Slots 2U Rack-mountable Integrated Service Router

Here are the technical specifications for the Cisco 2821 Router:

1. Dimensions: 43.2 cm x 43.8 cm x 4.4 cm
2. Weight: 9.1 kg
3. Power Supply: AC 120/230 V (50/60 Hz)
4. RAM: 512 MB (installed) / 1 GB (max)
5. Flash Memory: 64 MB (installed) / 256 MB (max)
6. Data Link Protocol: Ethernet, Fast Ethernet, Gigabit Ethernet
7. Network / Transport Protocol: IPSec, PPPoE, PPPoA, DHCP, DNS, L2TPv3, DDNS, RTP, SIP
8. Remote Management Protocol: SNMP 3, HTTP, HTTPS, SSH, CLI
9. Encryption Algorithm: DES, Triple DES, AES
10. Authentication Method: RADIUS, TACACS+, Secure Shell v.2 (SSH2)
11. Features: Firewall protection, VPN support, MPLS support, Syslog support, IPv6 support, Class-Based Weighted Fair Queuing (CBWFQ), Weighted Random Early Detection (WRED)
12. Interfaces: 2 x 10Base-T/100Base-TX/1000Base-T - RJ-45, 2 x USB - Type A, 1 x console - RJ-45, 1 x auxiliary - RJ-45

Helpful notes:
1. The Cisco 2821 Router is a reliable and secure solution for small to medium-sized businesses.
2. It supports advanced security features such as VPN and firewall protection.
3. The router has a modular design, allowing for easy upgrades and expansion.