D-Link's DGS-3120 xStack 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 and enhanced security, making them an ideal Gigabit access layer solution. The DGS-3120-24TC provides 20 Gigabit ports and 4 combo SFP ports. This switch is also equipped with an SD Card slot, allowing the user to boot images and upload configuration files directly from an SD Card.