Cisco CISCO1921/K9 Integrated Services Router
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Cisco CISCO1921/K9 Integrated Services Gigabit Ethernet Refurbished

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Part Number#: CISCO1921/K9
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Short Description:
CISCO1921/K9 1921 Series 2 Ports 512 Synchronous Dynamic Random Access Memory (SDRAM) 2 x HWIC 2 x 10/100/1000Base-T Local Area Network (LAN) Gigabit Ethernet Modular Router | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

Product Specification of the Cisco CISCO1921/K9 Gigabit Ethernet

In the realm of networking, the Cisco CISCO1921/K9 Integrated Services Gigabit Ethernet Modular Router stands out as a powerful and versatile solution. This review aims to provide a detailed analysis of this 2 Ports router, covering its key features, specifications, and practical applications.

Key Features of Cisco CISCO1921/K9

The Cisco CISCO1921/K9 router is known for its impressive array of features, making it a popular choice for businesses and organizations seeking robust networking solutions. Here are some of its key features:

Gigabit Ethernet Connectivity

The router boasts Gigabit Ethernet ports, enabling high-speed data transfer and efficient communication within a network. This feature is crucial for businesses with demanding data requirements.

Modular Design

One of the standout features of the CISCO1921/K9 is its modular design. This allows for flexibility in configuration, letting users adapt the router to their specific needs by adding or upgrading modules.

Integrated Services

The router is designed to provide integrated services, streamlining various functions within a single device. This integration enhances efficiency and simplifies network management.

Advanced Security Protocols

Security is a top priority in networking, and the CISCO1921/K9 doesn't disappoint. It supports advanced security protocols, ensuring the confidentiality and integrity of data transmitted through the network.


Businesses evolve, and so should their networking infrastructure. The Cisco router is scalable, allowing for easy expansion as the network grows, without compromising on performance.

Technical Specifications

Understanding the technical specifications of the Cisco CISCO1921/K9 is essential for making informed decisions about its suitability for specific networking requirements. Let's delve into the technical details:

Processor and Memory

The router is equipped with a powerful processor, ensuring efficient data processing. Additionally, it features ample memory to handle concurrent tasks and maintain optimal performance.


The CISCO1921/K9 comes with a variety of interfaces, including Gigabit Ethernet ports, USB ports, and console ports. These interfaces facilitate connectivity and ease of management.

Form Factor

The router's form factor is designed for versatility, with a rack-mountable configuration. This makes it suitable for various deployment scenarios, whether in a data center or as part of an office network.

Network Modules

As a modular router, the CISCO1921/K9 supports different network modules, such as WAN interface cards (WICs) and voice interface cards (VICs). This modularity enhances the router's adaptability to diverse networking needs.

Security Features

Security is a paramount concern in networking, and the Cisco router addresses this with features like VPN support, firewall capabilities, and encryption protocols. These ensure that data remains secure during transmission.

Practical Applications

The Cisco CISCO1921/K9's rich feature set and robust specifications make it suitable for a wide range of practical applications. Let's explore some scenarios where this router excels:

Small to Medium-sized Businesses (SMBs)

SMBs often require a networking solution that is both powerful and cost-effective. The CISCO1921/K9, with its scalability and integrated services, is well-suited for SMBs looking to establish a reliable and secure network infrastructure.

Branch Office Connectivity

For organizations with multiple branches, seamless connectivity is crucial. The router's modular design allows for customization based on the specific needs of each branch, ensuring efficient communication and data transfer.

Data Center Integration

In data center environments, where high-speed data transfer and scalability are paramount, the Cisco router's Gigabit Ethernet ports and modular capabilities make it a valuable asset. It can handle the demands of a dynamic and resource-intensive data center.

Remote Access and Telecommuting

With the increasing trend of remote work, secure and reliable remote access is essential. The CISCO1921/K9's VPN support and advanced security features make it an ideal choice for organizations supporting telecommuting initiatives.

Voice and Video Services

In environments where voice and video communication are critical, such as unified communications setups, the router's support for voice interface cards (VICs) ensures high-quality and reliable voice services.

Configuration and Management

Effectively harnessing the capabilities of the CISCO1921/K9 requires a robust configuration and management interface. Cisco provides a user-friendly Command-Line Interface (CLI) and a web-based graphical interface for configuration. The CLI offers advanced users granular control over settings, while the web interface simplifies the process for those less familiar with command-line operations.

The router's management capabilities extend to remote management, allowing administrators to monitor and configure the device from virtually anywhere with a secure connection. This flexibility enhances the efficiency of network management, especially in scenarios where on-site access may be limited.

Comparative Analysis

To truly appreciate the CISCO1921/K9, it's beneficial to compare it with similar routers in the market. This section will briefly compare the Cisco router with a few competitors, highlighting its strengths and potential areas for improvement.

Cisco CISCO1921/K9 Juniper SRX300

Both routers are popular choices for mid-sized networks, but the CISCO1921/K9's modular design gives it an edge in terms of flexibility and scalability. The Juniper SRX300, however, may offer a more intuitive web-based interface for users who prioritize ease of use.

Cisco CISCO1921/K9 HPE MSR930

The HPE MSR930 competes closely with the CISCO1921/K9 in terms of modular design and scalability. However, the Cisco router's reputation for robust security features gives it a competitive advantage in scenarios where stringent security is a top priority.

Cisco CISCO1921/K9 TP-Link Archer C4000

While the TP-Link Archer C4000 is a capable router, it is more consumer-oriented compared to the CISCO1921/K9. The Cisco router's modular design and enterprise-level features make it better suited for business and professional environments.

Performance of Ethernet Router

The Cisco 1921 is an Ethernet integrated services router (ISR) that is designed to provide a wide range of connectivity and security features for small to medium-sized businesses. It is powered by a dual-core processor and has a maximum data rate of 300 Mbps.

Some of the key features of the Cisco 1921 include support for multiple WAN interfaces, including Ethernet, serial, and 3G/4G LTE, as well as support for VPN connections, quality of service (QoS), and security features such as firewall and intrusion prevention.

In terms of performance, the Cisco 1921 is capable of handling numerous concurrent connections and can support a variety of applications, including voice, video, and data. It is also designed to be energy efficient, with a range of power-saving features. Overall, the Cisco 1921 is a reliable and high-performance router that is well-suited for use in small to medium-sized businesses.

Advanced Security Features

The CISCO1921/K9 Cisco Integrated Services Router is a high-performance router that offers advanced security features to protect networks and devices from external threats. Some of the key security features include:

  • Firewall: The router includes a stateful firewall that inspects and filters incoming and outgoing network traffic based on predefined security policies. This feature helps to prevent unauthorized access to the network and protects against cyber attacks.
  • VPN: The router supports multiple VPN protocols, including IPsec, SSL, and L2TP, to securely connect remote users and devices to the network.
  • Intrusion Prevention System (IPS): The router includes an IPS that monitors network traffic in real-time and detects and blocks malicious activity, such as malware, worms, and viruses.
  • Access Control Lists (ACLs): The router supports ACLs to control access to network resources based on user roles and permissions. This feature helps to prevent unauthorized access to sensitive data and devices.
  • Network Address Translation (NAT): The router supports NAT to hide internal IP addresses and make the network more secure against external threats.
  • Dynamic Host Configuration Protocol (DHCP) Snooping: The router supports DHCP snooping to prevent DHCP spoofing attacks and protect DHCP clients from rogue DHCP servers.
  • Advanced Quality of Service (QoS): The router supports advanced QoS features to prioritize network traffic and ensure that critical applications and services are not impacted by high traffic loads.
  • Secure boot: The router's secure boot feature ensures that only authorized firmware can be loaded on the device and prevents unauthorized access to the network.
  • 802.1x: The router supports 802.1x to provide user-level authentication for network access and prevent unauthorized access to the network.
  • Advanced Malware Protection (AMP): The router includes advanced malware protection to detect and block malware and other advanced threats, as well as provide threat visibility across the network.

General Information about this Cisco CISCO1921/K9

  • Manufacturer: Cisco
  • Model Number or SKU# CISCO1921/K9
  • Product Series: 1900
  • Product Model: 1921
  • Product Type: Gigabit Ethernet Router

Interfaces/Ports for 2 Ports Integrated Services Router

  • Total Number of Ports 2
  • USB Yes
  • Management Port Yes
  • Number of Network (RJ-45) Ports 2

Network and Communication of 1921 Integrated Services Router

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

Management Protocols

  • Security Features:
  • IPSec
  • SSL
  • AAA
  • PKI
  • Content Filtering
  • L2TP v3
  • GRE

I/O Expansions

  • Number of Total Expansion Slots 2
  • Expansion Slot Type HWIC
  • Standard Memory: 512 MB
  • Maximum Memory: 512 MB
  • Memory Technology: DRAM (Dynamic Random-Access Memory)
  • Flash Memory: 256 MB
Power Description
  • PoE (RJ-45) Port: Yes (Power over Ethernet)
  • Input Voltage: 220 V AC, 110 V AC
  • Power Source: Power Supply

Outline, the Cisco CISCO1921/K9 Integrated Services Gigabit Ethernet Modular Router emerges as a formidable networking solution, offering a blend of advanced features, scalability, and robust security. Its versatility makes it suitable for a variety of applications, from small businesses to large enterprises with complex networking needs.

Whether it's the router's Gigabit Ethernet connectivity, modular design, or advanced security protocols, each feature plays a crucial role in establishing a reliable and efficient network infrastructure. As technology continues to evolve, the Cisco router's scalability ensures that it can adapt to the changing demands of modern networking environments.

Ultimately, the CISCO1921/K9 stands as a testament to Cisco's commitment to delivering high-performance networking solutions that cater to the diverse needs of businesses and organizations in an ever-evolving digital landscape.

Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

About Refurbished Products

Refurbished products are typically refurbished by an Original Manufacturer or an affiliate of the manufacturer or 3rd party facility. This product may have minor blemishes due to normal product usage and doesn't necessarily come with documentation and software unless indicated, but has been well tested and generally has never had any defects.

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