WAN Interfaces: One Gigabit Ethernet (GE) port and one Fast Ethernet (FE) port for redundant WAN connections or load balancing.
LAN Switch: An integrated 8-port 10/100 managed switch for connecting local devices like computers and printers.
PoE Option: Four of the LAN switch ports can optionally supply Power over Ethernet (PoE) to power IP phones or access points.
Security & VPN
Integrated Threat Defense: Includes a Zone-Based Firewall, Intrusion Prevention System (IPS), and content filtering to protect against network attacks.
VPN Support: Supports IPsec VPNs (DES, 3DES, AES), DMVPN, GET VPN, and SSL VPN for secure site-to-site and remote-access connections.
Hardware Acceleration: Security features like encryption are hardware-accelerated for better performance.
Wireless & Routing
Wireless Option: Certain variants (like the 891W) include an integrated dual-radio 802.11a/g/n access point, which can operate in autonomous or unified (controller-based) mode.
Routing Protocols: Supports RIP, OSPF, EIGRP, BGP, and VRF-Lite for flexible routing in small to medium networks.
Management & Hardware
Memory: Ships with 512 MB DRAM (upgradable to 768 MB) and 256 MB flash.
Ports: Includes USB 2.0 ports, a console port, and an auxiliary port (for out-of-band management or dial backup).
Form Factor: Compact desktop unit, fanless for silent operation
