Cisco CISCO2921/K9 3-Ports Integrated Service Router
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The Cisco CISCO2921-K9 (ISR 2921, part of the Cisco 2900 Series) is a 2U rack-mount Integrated Services Router featuring three built-in Gigabit Ethernet ports (10/100/1000 Mbps) for LAN/WAN connectivity. It includes four EHWIC expansion slots for additional WAN, voice, or serial interfaces, three onboard DSP (PVDM) slots for voice processing, and a dedicated service module slot. Powered by Cisco IOS Software (IP Base and optional Security license), it delivers rich security services (including VPN, firewall, NAT, QoS, and dynamic routing protocols like OSPF, BGP, and RIP), with hardware encryption acceleration and throughput up to ~180 Mbps depending on services enabled