This D-Link 24-Port Fast Ethernet Managed L2 Switch features 2 Gigabit SFP Ports and 2 Gigabit Combo BASE-T/SFP Ports and a switching capacity of 12.8 Gbps. The beneficial design of 2 Gigabit/SFP Combo ports and 2 dedicated SFP ports provide up to 4 Gbps uplink bandwidth or dual Ethernet ring topology support. The bandwidth control feature allows network administrators to define the throughput levels for each port in order to manage bandwidth. It also provides fine granularity to define the ingress/egress traffic limits down to 8kbps segments. The switches also support the Broadcast Storm Control feature which minimizes the chance of a virus attack within the network. In addition, the Access Control List (ACL) feature enhances the network security and switch performance.