CISCO851-K9 Specifications
Cisco 851 Ethernet-to-Ethernet Router + 4‑Port Integrated Switch
Manufacturer: Cisco
Manufacturer Model: CISCO851-K9
Product Line: Cisco 850 Series
Product Series: SOHO / Small Office Router
Product Type: Fixed‑Configuration Router + Integrated 4‑Port Switch
Product Name: Cisco 851 Ethernet-to-Ethernet Router
KEY FEATURES:
WAN Interface: 1 × 10/100 Mbps Fast Ethernet (RJ‑45)
LAN Interfaces: 4 × 10/100 Mbps Fast Ethernet (RJ‑45) — integrated switch
Memory (DRAM): 64 MB (max 64 MB)
Flash Memory: 20 MB (fixed)
Console/Aux Port: RJ‑45
Power Supply: External AC adapter, Universal 100–240 VAC input
PERFORMANCE / FUNCTIONALITY:
Routing Protocols: Supports standard routing including dynamic routing (e.g., RIP‑1, RIP‑2)
NAT/PAT: Yes
Firewall: Stateful‑inspection firewall, access control lists (ACLs) supported
VPN: Supports IPsec VPN (hardware‑accelerated 3DES/AES), allows VPN tunnels and VPN pass‑through
DHCP: Router includes DHCP server/relay/client support
ENVIRONMENTAL & RELIABILITY:
Operating Temperature: 0° to 40 °C (32° to 104 °F)
Power Input: 100–240 VAC AC, frequency 50–60 Hz, maximum output power ~26 W
PHYSICAL:
Dimensions: approx. 2.00 × 10.25 × 8.50 inches
Weight: ~2.10 lb

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