| Specification | Details |
|---|---|
| Product Model | Cisco ISR4331-SEC/K9 |
| Product Series | Cisco ISR 4000 Series |
| Device Type | Integrated Services Router |
| Performance | Up to 100 Mbps Throughput |
| WAN Interfaces | Modular WAN Interface Support |
| Security Features | Firewall, VPN, IPS, Advanced Security Services |
| Network Ports | 3 x Gigabit Ethernet Ports |
| Expansion Slots | NIM, ISC, SM Module Support |
| Operating System | Cisco IOS XE |
| Rack Mount | 1RU |
| Power Supply | AC Power Supply |
| Target Application | Enterprise Branch Networking |
| Category | Specification |
|---|---|
| Product Model | ISR4331-SEC/K9 |
| Router Type | Secure Integrated Services Router |
| Platform | Cisco ISR 4000 Series |
| Form Factor | Rack-mount 1RU |
| Throughput Performance | 100 Mbps Default Performance |
| CPU | Multi-core Processor Architecture |
| Memory | 4 GB DRAM (Expandable) |
| Flash Memory | 4 GB Flash |
| Ethernet Interfaces | 3 x Gigabit Ethernet |
| Console Port | RJ-45 Console Port |
| USB Ports | USB Type A Ports |
| Network Modules | Supports Cisco NIM Modules |
| Service Module Support | Supports SM-X Modules |
| Security License | SEC Bundle Included |
| Firewall Capability | Zone-Based Firewall Support |
| VPN Support | IPsec VPN, SSL VPN, DMVPN |
| Encryption | Hardware-based Encryption Support |
| Intrusion Prevention | Cisco IOS XE Security Features |
| Routing Protocols | OSPF, EIGRP, BGP, RIP |
| IPv6 Support | IPv6 Routing and Security |
| QoS Features | Advanced Quality of Service |
| Management | Cisco CLI, SNMP, Web Management |
| Software Platform | Cisco IOS XE |
| Power Supply | AC Power Supply |
| Mounting | Standard 19-inch Rack Mount |
| Operating Temperature | 0°C to 40°C |
| Security Applications | Branch Security Gateway, VPN Hub, WAN Edge Router |
The Cisco ISR4331-SEC/K9 Integrated Services Router is a secure enterprise-class router designed for branch offices, small and medium-sized businesses, and distributed enterprise networks. As part of the Cisco ISR 4000 Series, it combines high-performance routing, WAN connectivity, application services, and advanced security features into a single compact platform.
The Cisco ISR4331-SEC/K9 provides built-in security capabilities including:
- Zone-Based Firewall
- IPsec VPN encryption
- Secure remote access
- Threat protection features
- Advanced access control
It helps enterprises protect sensitive data while maintaining reliable network performance.
Designed for enterprise branch deployments, the ISR4331-SEC/K9 supports:
- Multi-service WAN connectivity
- Advanced routing protocols
- Application-aware networking
- Quality of Service (QoS)
It enables businesses to run voice, video, cloud applications, and critical services efficiently.
The ISR4331-SEC/K9 supports Cisco modular expansion options, including:
- Network Interface Modules (NIM)
- Service Modules
- Additional WAN connectivity options
Organizations can easily upgrade their network infrastructure without replacing the entire router.
| Feature | ISR4331-SEC/K9 | ISR4321-SEC/K9 |
|---|---|---|
| Series | ISR 4000 | ISR 4000 |
| Performance | Higher throughput | Lower throughput |
| Gigabit Ethernet | 3 Ports | 2 Ports |
| Expansion Capability | More scalable | Limited |
| Enterprise Usage | Medium branches | Small branches |