D-Link DGS-3120-24TC Managed 24-Port Gigabit Stackable Switch

Overview

The D-Link DGS-3120-24TC/SI is a managed Layer 2 and Layer 3 Gigabit Ethernet switch designed to provide enterprise-level network control for small and medium-sized businesses. It features twenty RJ45 Gigabit ports for direct device connections and four combo SFP slots that support both copper and fiber transceivers, offering flexible uplink and long-distance connectivity options. With a switching capacity of 88 Gbps, it handles heavy data traffic efficiently while supporting IPv6 management, access control lists, and static routing to meet modern networking demands.

Key features

• Twenty Gigabit RJ45 ports and four combo SFP slots provide versatile connection options for desktops, IP phones, wireless access points, and surveillance cameras.
• Layer 2 and Layer 3 management capabilities enable detailed traffic segmentation, policy enforcement, and support for IPv6 networks without hardware upgrades.
• Physical stacking support with 40 Gbps dedicated stack bandwidth allows multiple switches to be managed as a single unit, simplifying network administration and enhancing resilience.
• Advanced security features like IP-MAC-Port Binding and DHCP Snooping protect the network from unauthorized devices and fraudulent address assignments.
• D-Link Green technology intelligently reduces power consumption by powering down unused ports and adjusting fan speed based on traffic and temperature, lowering energy costs and heat output.
• Rack-mount design fits standard equipment cabinets, making it suitable for dense network environments such as server rooms and remote cabinets with limited airflow.

Key specs

• Ports: 20 x RJ45 Gigabit Ethernet, 4 x combo SFP slots (copper or fiber)
• Switching capacity: 88 Gbps
• Stack bandwidth: 40 Gbps
• Management: Layer 2 and Layer 3 with IPv6 support
• Security: IP-MAC-Port Binding, DHCP Snooping, access control lists
• Power-saving features: port-level energy management, smart fan control
• Form factor: rack-mountable

Connectivity and compatibility

This switch supports a wide range of network devices through its twenty Gigabit Ethernet ports and four combo SFP slots, which accept both copper and fiber transceivers. This flexibility allows seamless integration with existing network infrastructure and supports long-distance links where fiber is required. The device’s IPv6 management and static routing capabilities ensure compatibility with modern network protocols and future-proof your setup.

Performance and reliability

With an 88 Gbps switching capacity and 40 Gbps stack bandwidth, the switch handles high data throughput with low latency, making it suitable for environments with heavy traffic such as office networks, school campuses, or retail installations. The physical stacking feature enhances network resilience by allowing multiple units to operate as a single system, reducing downtime and simplifying maintenance. Security mechanisms protect against unauthorized access and network attacks, ensuring consistent service quality for voice and video applications.

Ideal uses and environments

The DGS-3120-24TC/SI fits well in growing office networks, educational campuses, and small to medium-sized enterprises that require reliable, scalable, and secure network infrastructure. It works effectively as an access layer switch connecting end-user devices or as an aggregation point consolidating multiple network segments. Its energy-efficient design and rack-mount form factor make it a strong choice for installations where power consumption and space are important considerations.