The 1721 is an enhanced version of the award-winning  1720 Modular Access Router. The  1721 offers higher performance, additional functionality, and increased memory capacity over the 1720. In addition, the 1721 supports standards-based IEEE 802.1Q VLAN routing, which enables enterprises to set up multiple VLANs and route between them for added security within the internal corporate network. Powered byIOS Software, the 1721 and 1720 routers provide a cost-effective solution for small and medium businesses and enterprise small branch offices to support e-business applications through a comprehensive feature set in a compact design.

Specifications

• A RISC processor to support high-performance routing, encryption, and broadband services
  
• One autosensing 10/100 Fast Ethernet port
  
• Two WAN interface card (WIC) slots that support the same data WAN interface cards as the Cisco 1600, 2600, and 3600 routers
  
• One auxiliary (AUX) port (up to 115.2-kbps asynchronous serial)
  
• One console port
  
• One internal expansion slot for the hardware-assisted VPN encryption card (MOD1700-VPN)