The DGS-3120 x Stack Series are enhanced L2 access stackable switches designed to connect end-users in a secure SMB or enterprise network. These switches support physical stacking,  multicast & enhanced security,  making them an ideal Gigabit access layer solution. They are equipped with an SD Card slot,  allowing the user to boot images & upload configuration files directly from an SD Card. The DGS-3120 Series is embedded with two different software images
- Standard Image (SI) & Enhanced Image (EI). The Standard Image provides sophisticated features for small & medium businesses,  including advanced Quality of Service (Qo S),  traffic shaping,  L2 multicasting,  & robust security features. The Enhanced Image supports ERPS,  Double VLAN (Q-in-Q),  Ethernet OAM,  Static Route,  IMPB,  s Flow,  IPv 6 features which are suitable for the next generation IPv 6 networks or triple play applications in Metro Ethernet. The DGS-3120 Series targets small & medium businesses that require a high level of network security & maximum uptime. All the models in DGS-3120 Series support an external redundant power supply so that continued operation can be assured. They also include other features,  such as Spanning Tree,  Rapid Spanning Tree & Multiple Spanning Tree,  Loopback Detection,  & Broadcast Storm Control,  which enhance network resilience. The Ethernet Ring Protection Switching (ERPS) function minimizes the recovery time in case of a loop failure. For load sharing & redundancy backup in switch cascading/server attachment configuration,  the DGS-3120 Series provides dynamic port trunking. The DGS-3120 Series provides users with the latest security features such as Multi-layer & Packet Content Access Control Lists (ACL),  Storm Control,  & IP-MAC-Port Binding (IMPB) with DHCP Snooping. The IP-MAC-Port Binding feature allows administrators to bind a source IP address with an associated MAC & also define the port number to enhance user access control. With the DHCP Snoo                                             
