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 Snooping feature,  the switch automatically learns IP/MAC pairs by snooping DHCP packets & saving them to the IMPB white list. In addition,  the D-Link Safeguard Engine identifies & prioritizes "CPU interested" packets to prevent malicious traffic from interrupting normal network flows,  & to protect switch operation. The DGS-3120 Series supports authentication mechanisms & security policies that can be applied individually to each connected host. In addition,  the switch also supports Microsoft NAP (Network Access Protection). NAP is a policy enforcement technology that allows administrators to protect network assets from unhealthy computers by enforcing compliance with network health policies. The DGS-3120 Series implements a rich set of multilayer Qo S/ Co S features to ensure that critical network services like Vo IP,  video conference,  IPTV & IP surveillance are served with high priority. The Traffic Shaping features guarantee bandwidth of these services when the network is busy. With L2 Multicast support,  the DGS-3120 shows its ability to handle growing IPTV applications. To uphold users' Service Level Agreements (SLA),  service providers must reduce the Mean Time to Repair (MTTR) & increase service availability. Ethernet OAM features address these challenges & enable service providers to offer carrier-grade services. The DGS-3120 Series supports industry-standard OAM tools,  including IEEE 802.3ah,  IEEE802.1ag,  & ITU-T Y.1731. Connectivity Fault Management (CFM) provides tools to monitor & troubleshoot end-to-end Ethernet networks,  allowing service providers to check connectivity,  isolate network issues,  & identify customers affected by network issues. The DGS-3120 Series is fully compliant with the future IPv 6 networks. It supports IPv 6-based security functions to protect the network from illegal IPv 6 clients. The DGS-3120 Series has been certified with IPv 6 Ready Logo Phase 2 from the IPv 6 forum,  a worldwide IPv 6 advocacy consortium. Please note: networking components such as switches,  routers & wireless devices require that speeds & standards be consistent throughout the network to gain optimum performance. To avoid compatibility clashes or for advice,  please contact us on solutions@ebuyer.com.                                             
