Cisco ISR4331-SEC/K9 6 Slots Router
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ISR4331-SEC/K9 Cisco 6 Slots Router 1U Rack-mountable 4GB New

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Part Number#: ISR4331-SEC/K9
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Short Description:
ISR4331-SEC/K9 3 Ports Gigabit Ethernet 1U Rack-mountable Wall Mountable 4 GB Flash Memory 4331 10/100/1000Base-T Integrated Service Router | Made by Cisco | New Factory Sealed
Product Condition:
New Retail Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

Product Outline for the Cisco ISR4331-SEC/K9 6 Slots Router

One such powerful device is the Cisco ISR4331-SEC/K9, a robust Integrated Service Router designed to meet the demands of modern networks. Integrated Service Routers (ISRs) are a crucial component of Cisco's networking infrastructure. These devices combine routing, security, and other essential features into a single, integrated platform, streamlining network operations and enhancing overall efficiency. The Cisco ISR4331-SEC/K9 is a part of Cisco's Integrated Services Router (ISR) series, known for its reliability and advanced features. With 3 ports, 6 slots, and a Gigabit Ethernet interface, this router is designed to meet the demanding networking needs of modern businesses.

Functionalities of Rack-mountable 4GB Flash Memory Router

Efficient Data Routing

The ISR4331-SEC/K9 excels in data routing capabilities, efficiently directing data packets between devices within the network. This functionality is crucial for maintaining a smooth flow of information and optimizing network performance.

Wall Mountable Design

Cisco understands the importance of space optimization in diverse business environments. The wall-mountable design of the ISR4331-SEC/K9 allows for efficient space utilization, making it suitable for installations where floor space is a premium.

Integrated Service Router with Security (SEC) Bundle

Security is paramount in the digital age, and the ISR4331-SEC/K9 addresses this concern by featuring an integrated security bundle. This bundle includes advanced security protocols and measures, fortifying the network against potential threats and vulnerabilities.


Businesses evolve, and so do their networking requirements. The six available slots in this router cater to scalability needs, allowing organizations to expand their network infrastructure without the need for a complete overhaul.

Gigabit Ethernet Connectivity

Gigabit Ethernet support ensures high-speed connectivity, enabling quick and reliable data transfers. This feature is particularly beneficial for bandwidth-intensive applications like video conferencing, large file transfers, and real-time collaboration.

Security Protocols

The integrated security bundle brings a layer of protection to the ISR4331-SEC/K9. From encryption to intrusion prevention, the router is equipped to safeguard sensitive data and mitigate potential security risks.

Management of Network Bandwidth

Managing the network bandwidth of the ISR4331-SEC/K9 Cisco Small Business ISR 4331 Router can be done using a variety of methods, including:

  • Quality of Service (QoS): A set of technologies that allow you to prioritize certain types of network traffic, such as voice or video, over other types of traffic. This can help ensure that critical applications have sufficient bandwidth and that less critical traffic does not consume too much bandwidth.
  • Traffic Shaping: A technique that allows you to limit the amount of bandwidth that is used by specific types of traffic or by specific users or devices. This can help ensure that all users have fair access to the available bandwidth and that no single user or device can consume too much bandwidth.
  • Access Control Lists (ACLs): A feature that allows you to block or restrict access to specific types of traffic or from specific IP addresses or ranges. This can help protect your network from security threats and can also be used to limit the amount of bandwidth that is used by specific users or devices.
  • NetFlow: A Cisco proprietary protocol that provides detailed information about network traffic, including IP address, port number, and protocol. This information can be used to monitor and network issues, as well as to detect and prevent security threats, and to identify the sources of heavy traffic.

To manage the network bandwidth on ISR4331-SEC/K9, you would typically use the Cisco Configuration Professional (CCP) web-based interface to configure the QoS, Traffic shaping, and ACL settings, or use the Cisco IOS Command-Line Interface (CLI) to configure these settings.

Security Management Systems

The ISR4331-SEC/K9 Cisco Small Business ISR 4331 Router is a high-performance network security device that provides advanced security features to protect networks and devices connected to it. Some of the key security management systems of this router include:

  • Access Control Lists (ACLs): This feature allows administrators to set up user accounts and assign different levels of access permissions to them. This helps to prevent unauthorized access to the router's configuration and management interface.
  • Firewall: The router has a built-in firewall that can be configured to block or allow specific types of traffic, such as IP addresses, ports, and protocols. This helps to prevent unauthorized access to the network and protect against cyber threats such as malware and hacking attempts.
  • Virtual Private Network (VPN): The router supports VPN connections, which allow remote users to securely access the network and resources on it. This feature can be used to set up secure connections for telecommuters and other remote workers.
  • Intrusion Prevention System (IPS): The router has IPS capabilities that can detect and block malicious traffic before it reaches the network. This helps to prevent cyber attacks and protect against malware, hacking attempts, and other threats.
  • Advanced Malware Protection (AMP): The router includes AMP capabilities to protect against advanced persistent threats and zero-day attacks.
  • Cisco Identity Services Engine (ISE): This feature allows for secure network access using 802.1X and provides network profiling, posture assessment, and guest management.
  • Security Intelligence Operations (SIO): The router has the capability of integrating with SIO, which provides real-time threat intelligence and security analytics.
  • Security updates: The router can be configured to automatically download and install security updates to ensure that it is always running the most recent and secure version of its firmware.
  • Other security features include Secure boot, Secure boot image, Encrypted configuration file, Secure copy (SCP) and Secure shell (SSH) protocols, and Secure socket layer (SSL) and transport layer security (TLS) protocols.

Quality of Service (QoS) Capabilities

The ISR4331-SEC/K9 Cisco Small Business ISR 4331 Router has advanced Quality of Service (QoS) capabilities that allow administrators to prioritize different types of network traffic, ensuring that critical applications and services receive the bandwidth they need to operate effectively. Some of the key QoS features of this router include:

  • Class-Based Weighted Fair Queueing (CBWFQ): This feature allows administrators to assign different levels of priority to different types of traffic, such as voice, video, and data. This ensures that critical applications and services receive the bandwidth they need to operate effectively, while less critical traffic is given lower priority.
  • Low Latency Queuing (LLQ): LLQ is a variation of CBWFQ that is designed to minimize the delay of time-sensitive traffic, such as voice and video. This helps to ensure that these types of traffic are delivered with minimal delay and jitter, resulting in high-quality voice and video.
  • Weighted Random Early Detection (WRED): This feature helps to prevent network congestion by randomly dropping packets when the queue becomes full. This helps to ensure that critical traffic is given priority and is less likely to be dropped.
  • Traffic shaping and policing: The router can be configured to limit the amount of bandwidth that certain types of traffic can consume, helping to ensure that all devices on the network have access to the bandwidth they need.
  • Quality of Service (QoS) using DiffServ: The router supports QoS using Differentiated Services (DiffServ) which provides scalable, fine-grained QoS by classifying and prioritizing IP traffic.
  • Link fragmentation and interleaving (LFI): LFI improves the performance of time-sensitive traffic over low-speed links by fragmenting large packets and interleaving smaller packets of time-sensitive traffic with larger packets.
  • The router also supports Multi-Field Classification (MFC) which allows granular classification of traffic based on different fields such as IP address, protocol, and port.
  • These QoS capabilities can be implemented to help ensure that critical applications and services are delivered with minimal delay and jitter, resulting in high-quality voice and video.

Detail Information about this Cisco ISR4331-SEC/K9 Wall Mountable Router

  • Manufacturer: Cisco
  • Model Number or SKU# ISR4331-SEC/K9
  • Product Series: 4000
  • Product Type: Router

Interfaces / Ports for Service Router

  • Total Number of Ports: 3
  • USB: Yes
  • Powerline: No
  • Management Port: Yes
  • Serial V.35 Interface: No
  • Number of Network (RJ-45) Ports: 2

I/O Expansions of 3 Ports Router

  • Number of Total Expansion Slots: 6
  • Expansion Slot Type: Embedded Service Processor
  • Expansion Slot Type: SFP
  • Expansion Slot Type: Smart Interface Card (SIC)
  • Expansion Slot Type: Network Interface Module (NIM)

Network & Communication

  • Network Technology: 10/100/1000Base-T
  • Ethernet Technology: Gigabit Ethernet

Memory for Ethernet Router

  • Standard Memory: 4 GB
  • Maximum Memory: 16 GB
  • Memory Technology: DDR3 SDRAM


  • Firewall Protection, VPN Support, VLAN Support, Syslog Support, Ipv6 Support, Class-based Weighted Fair Queuing (CBWFQ), Weighted Random Early Detection (WRED), Wall Mountable, Ipsec Virtual Private Network (VPN), Access Control List (ACL) Support, Quality Of Service (QoS), Dynamic Multipoint Vpn (DMVPN), Radius Support, Netflow, IPFIX
Compliant Standards
  • Ieee 802.3, Ieee 802.1q, Ieee 802.3ah, Ieee 802.1ag, Ansi T1.101, Itu-t G.823, Itu-t G.824, Cispr 22 Class A, Cispr 24, En55024, En55022 Class A, En50082-1, As/nzs 60950-1, Ices-003 Class A, Cs-03, R&tte, Fcc Cfr47 Part 15, En300-386, Ul 60950-1, Iec 60950-1, En 60950-1, As/nzs 3548 Class A, Gb 4943, Can/csa C22.2 No. 60950-1, Vcci V-3, En 61000, Kn22, Kn24, Cns 13438
  • Power Device: Internal Power Supply - 250 Watt
  • Voltage Required: AC 120/230 V (50/60 Hz)

Finally, the Cisco ISR4331-SEC/K9 Integrated Service Router emerges as a robust networking solution, combining versatility, security, and scalability. Whether used in enterprise networks or remote offices, its features address the dynamic demands of modern businesses. As technology continues to advance, Cisco remains at the forefront, providing networking solutions that empower organizations to thrive in the digital landscape.

Product Condition:
New Retail Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

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What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

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