Cisco ISR4331-SEC/K9 is a powerful Integrated Services Router (ISR) from Cisco’s 4000 Series, designed for secure branch office and enterprise edge deployments. It comes with a built-in Security Bundle (SEC license), enabling advanced features like firewall, VPN, and intrusion prevention, making it ideal for organizations that require high performance with strong security.

This router delivers aggregate throughput of 100 Mbps to 300 Mbps, providing stable performance for data, voice, video, and cloud-based applications in small to medium-sized networks.

The ISR4331-SEC/K9 includes 3 × Gigabit Ethernet ports (2 RJ45 + 2 SFP combo options), offering flexible WAN and LAN connectivity for both copper and fiber networks. It also supports modular expansion with 2 NIM slots and 1 SM-X slot, allowing businesses to add additional interfaces and services as needed.

Powered by Cisco IOS XE software, the router supports advanced enterprise features such as SD-WAN, QoS, and application-aware networking, helping optimize traffic across WAN links.

Security is a major highlight, with integrated capabilities including IPsec VPN, firewall, intrusion prevention, and secure communication protocols, ensuring safe connectivity between branch offices and headquarters.

The device comes with 4GB RAM (expandable up to 16GB) and 4GB flash storage (expandable), ensuring scalability for growing network demands. It also includes USB ports, console, and management interfaces for easy configuration and monitoring.

With its 1U rack-mountable design, modular architecture, and enterprise-grade features, the Cisco ISR4331-SEC/K9 is a reliable solution for secure and scalable business networking.

· Key Features:

· Cisco 4000 Series Integrated Services Router (ISR)

· Security Bundle (SEC license) included

· Throughput: 100–300 Mbps

· 3 × Gigabit Ethernet ports (RJ45 + SFP combo)

· 2 × NIM slots + 1 × SM-X slot (modular expansion)

· 4GB RAM (expandable to 16GB)

· Cisco IOS XE with SD-WAN capability

· Advanced security: firewall, VPN (IPsec), IPS

· QoS & application-aware networking

· USB, console & management ports

· 1U rack-mountable design