Cisco C921-4P Gigabit Security Router with Built-in Switch

Specifications for Cisco 921 Gigabit Security Router with Built-in Switch

• Model: Cisco C921-4P

• WAN: 1x Gigabit Ethernet

• LAN/Switch: 4x Gigabit Ethernet

• Security: Integrated firewall, VPN

• Routing: Static, RIP, OSPF

• Management: CLI, SNMP, Web GUI

• Use Case: Branch and SMB networks

Cisco 921 Gigabit Ethernet Security Router delivers compact, secure performance

The Cisco 921 Gigabit Ethernet Security Router is purpose-built for branch deployments and small businesses seeking robust WAN connectivity with built-in security features. With four integrated LAN ports and a dedicated Gigabit WAN interface, the Cisco 921 Gigabit Ethernet Security Router combines Layer 3 routing, advanced firewall protection, and LAN switching into a single compact solution.

Ideal for locations where space is limited but performance can’t be compromised, the Cisco 921 Gigabit Ethernet Security Router is engineered for enterprise-grade reliability in a small form factor.

Cisco 921 Gigabit Ethernet Security Router supports advanced security for branch offices

Security is at the core of the Cisco 921 Gigabit Ethernet Security Router. Equipped with a built-in zone-based firewall, IPsec VPN support, and secure network address translation (NAT), the device protects against external threats while enabling remote access.

The Cisco 921 Gigabit Ethernet Security Router empowers organizations to create secure branch extensions without relying on third-party appliances, helping reduce overhead and simplify deployment.

Cisco 921 Gigabit Ethernet Security Router integrates Layer 3 routing and switching

Functioning as both a high-performance router and a 4-port managed switch, the Cisco 921 Gigabit Ethernet Security Router offers Layer 3 capabilities like static routing, RIP, and OSPF. Its switch ports are ideal for connecting local workstations, printers, or access points directly.

With Quality of Service (QoS), traffic shaping, and VLAN support, the Cisco 921 Gigabit Ethernet Security Router ensures optimal performance for voice, video, and data applications—especially critical for distributed teams.

Cisco 921 Gigabit Ethernet Security Router offers flexible management options

The Cisco 921 Gigabit Ethernet Security Router is designed with multiple management pathways to suit IT environments of all sizes. Whether through Cisco Configuration Professional, CLI access, or SNMP-based tools, administrators gain deep control over routing, NAT, firewall, and VPN settings.

In addition, the Cisco 921 Gigabit Ethernet Security Router supports Cisco IOS software, giving users the benefits of a stable, secure, and enterprise-proven operating system across deployments.

Cisco 921 Gigabit Ethernet Security Router is optimized for edge connectivity

Branch offices, remote retail locations, and small businesses benefit from the Cisco 921 Gigabit Ethernet Security Router thanks to its ability to maintain consistent uptime and performance. The platform’s failover support, compact chassis, and fanless design make it a low-maintenance but highly capable edge device.

Its Gigabit WAN port ensures that connections to core networks remain fast and reliable, even under heavy traffic conditions. The Cisco 921 Gigabit Ethernet Security Router proves that compact doesn’t mean compromised.

Cisco 921 Gigabit Ethernet Security Router scales with Cisco’s ISR ecosystem

For businesses looking to standardize their edge-to-core strategy, the Cisco 921 Gigabit Ethernet Security Router fits seamlessly into a broader Cisco ISR environment. It serves as an excellent edge router or branch-level gateway, especially when paired with more powerful core routing solutions like the Cisco ISR4331/K9 4331 Integrated Services Router

This layered approach ensures continuity, policy consistency, and performance across both small and large network segments. By leveraging the Cisco 921 Gigabit Ethernet Security Router at the edge, organizations can build a secure, scalable, and future-ready network architecture.