Cisco ISR-4331/SEC-K9 Integrated Services Router

Description

The Cisco ISR-4331/SEC-K9 is a security-enabled Cisco Integrated Services Router designed for professional enterprise networking environments. It is well suited for branch offices, remote sites, and distributed organizations that require reliable routing combined with advanced network-security capabilities.

The SEC-K9 configuration includes a Security license, providing access to applicable security functionality supported by the installed Cisco IOS XE software and licensing. The router offers a flexible platform for connecting branch networks with corporate WANs, data centers, Internet services, and other enterprise resources.

Key Features

Cisco ISR 4331 Integrated Services Router
Part number: ISR-4331/SEC-K9
Security-enabled configuration
Includes Security (SEC) license
Cisco IOS XE operating platform
Designed for branch and enterprise networks
Supports IP routing and WAN connectivity
Supports applicable security and VPN technologies
Suitable for remote-site and distributed enterprise deployments
Professional Cisco networking platform

Security-Enabled Networking

The ISR-4331/SEC-K9 is designed to combine enterprise routing with supported network-security services.

The included SEC license enables applicable security capabilities according to the installed IOS XE release and licensing configuration. This makes the router suitable for organizations that need secure connectivity between branch locations, corporate resources, and WAN infrastructure.

Depending on the installed software and licensing, supported technologies may include VPN and other enterprise security services.

Enterprise Branch Connectivity

The Cisco ISR 4331 platform is designed for branch-office and remote-site deployments where reliable network connectivity is essential.

It can be used to connect:

Branch LANs
Corporate WAN infrastructure
Internet services
Data centers
Cloud-connected environments
Remote offices
Other enterprise network segments

The router provides a centralized platform for routing and supported network services.

Cisco IOS XE

The ISR-4331/SEC-K9 operates using Cisco IOS XE, Cisco’s modern enterprise routing software platform.

IOS XE provides a modular software architecture and supports a broad range of routing, management, security, and network-service capabilities.

The exact feature set depends on the IOS XE version, installed license, and hardware configuration.

Security License

The SEC-K9 designation identifies the security-enabled configuration of the ISR 4331.

The Security license provides access to applicable Cisco security functionality supported by the software release. This can make the platform suitable for secure WAN and branch-network deployments.

Customers requiring specific features should verify the installed IOS XE release and license entitlement before deployment.

Flexible WAN and Network Architecture

The ISR 4331 can be integrated into a variety of enterprise network architectures.

Typical deployments can include:

Branch-to-headquarters connectivity
Secure WAN infrastructure
Remote-office networking
Internet edge routing
VPN-based connectivity
Data-center connections
Cloud and hybrid network environments

This flexibility makes the platform suitable for organizations with multiple locations and changing networking requirements.

Typical Applications

Enterprise Branch Offices

Provide routing and secure connectivity between branch users and centralized corporate resources.

Remote Sites

Connect geographically distributed offices to corporate infrastructure.

Secure WAN Networks

Support secure connectivity using applicable licensed Cisco technologies.

Small and Medium Businesses

Provide enterprise-grade routing and security capabilities.

Cisco Infrastructure

Integrate with existing Cisco-based networking environments.

Product Benefits

Security-Enabled Configuration: Includes the Security license for supported Cisco security functionality.

Enterprise Routing: Provides a professional platform for branch and WAN routing.

Cisco IOS XE: Uses Cisco’s modern enterprise networking software platform.

Flexible Deployment: Suitable for branch offices, remote locations, and distributed networks.

Secure Connectivity: Designed to support applicable security and VPN technologies.

Professional Platform: Built for enterprise network infrastructure and business-critical connectivity.

Technical Specifications

Specification	Details
Brand	Cisco
Product Family	Integrated Services Router
Model	ISR 4331
Part Number	ISR-4331/SEC-K9
Product Type	Security-Enabled Integrated Services Router
License	Security (SEC)
Operating Platform	Cisco IOS XE
Primary Function	Routing / WAN / Security
Deployment	Enterprise / Branch / Remote Site
Security Capabilities	Dependent on IOS XE release and license
Architecture	Integrated Services Router

Licensing Note

The ISR-4331/SEC-K9 includes a Security license. Cisco feature availability is dependent on the installed IOS XE software version, license entitlement, and configuration.

For deployments requiring specific VPN, encryption, firewall, or other advanced security features, customers should confirm the exact software and licensing requirements before installation.

Product Summary

The Cisco ISR-4331/SEC-K9 Integrated Services Router is a security-enabled enterprise routing platform designed for branch offices, remote sites, and distributed business networks.

With its Security license and Cisco IOS XE platform, it provides a flexible foundation for IP routing, WAN connectivity, and supported security services. It is a suitable choice for organizations seeking a professional Cisco routing solution for secure and scalable branch networking.

Product Category: Networking → Routers → Enterprise & Security Routers
Brand: Cisco
Model: ISR 4331
Part Number: ISR-4331/SEC-K9
Product Type: Integrated Services Router
License: Security (SEC)
Operating Platform: Cisco IOS XE
Primary Applications: Branch Routing, WAN Connectivity & Network Security