Most modern fiber-enabled network switches require an SFP transceiver module featuring a duplex (two strand) multimode OM3 or duplex single mode OS2 connection with LC connectors. Direct attach cables with pre-terminated SFP connections may also be used. Fiber provides: Increased internet signal bandwidth. The fiber has a very small core diameter of approximately 8. Unlike traditional Ethernet switches, which use copper cables to transmit data, fiber switches utilize fiber-optic cables, which carry data as light signals. Fiber switches are commonly used in. A network switch with fiber uplinks lets you break past the 100-meter limit of copper Ethernet, connecting distant buildings, server racks, or high-bandwidth cameras with zero signal degradation.