ISR4321/K9, Cisco ISR 4000 Series Router, 50-100Mbps throughput/2 WAN-LAN ports/1 SFP port

The Cisco ISR4321/K9 is a high-performance, compact, and versatile router from the Cisco 4000 Series Integrated Services Routers (ISR), specifically designed for small to medium branch offices and enterprise edge networks. Combining reliable throughput, advanced security capabilities, and flexible connectivity, the ISR4321/K9 provides a cost-effective solution for businesses that require dependable network performance and scalability.

Supporting throughput between 50Mbps and 100Mbps, this router is ideal for handling critical business applications such as cloud services, VPN, VoIP, video conferencing, and data transfers. Its robust performance ensures uninterrupted connectivity for multiple services running simultaneously, making it suitable for branch offices, retail locations, and remote sites.

The router includes 2 WAN/LAN ports, offering flexible deployment for primary and secondary network links, redundancy, or network segmentation. Additionally, it features 1 SFP (Small Form-factor Pluggable) port, enabling fiber-optic connectivity for high-speed, long-distance networking or integration with enterprise-grade fiber infrastructure. This combination of copper and fiber interfaces provides maximum flexibility and scalability.

Security is a cornerstone of the ISR4321/K9. Built-in advanced security features include VPN support, firewall, intrusion prevention, and secure segmentation, protecting sensitive business data and ensuring safe branch-to-branch communications. Cisco’s trusted security architecture ensures that networks remain safeguarded against evolving threats and maintain compliance with industry standards.

Powered by Cisco IOS XE software, the router offers enterprise-grade network management, automation, and programmability. Features such as Quality of Service (QoS), application visibility, traffic analytics, and WAN optimization allow IT teams to prioritize mission-critical applications, monitor performance, and enhance operational efficiency. Its modular design allows for expansion with additional WAN or LAN modules to accommodate growing network demands.

The ISR4321/K9 is compact, energy-efficient, and rack-mountable, making it ideal for deployment in small branch offices, retail outlets, or remote corporate locations. Its combination of performance, reliability, and security ensures seamless integration into existing networks, providing a scalable and robust platform for small to medium enterprise environments.

Whether securing VPN connections, supporting cloud applications, or optimizing network traffic, the Cisco ISR4321/K9 delivers reliable, secure, and versatile routing for organizations seeking enterprise-class functionality in a compact, cost-effective package.