16 10100Mbps +1 GigabitSFP Slots Switch With 16-Port PoE

You use SFP ports for uplinks and to free up a port on the switch Especially if you are close to maxes out on ports and also your uplinks

SFP module types support single mode and multimode fiber as well as Cat5, Cat6, Cat6a, and Cat7 twisted-pair copper SFP modules designed for

sfp slot meaning SFP Module 1000BASE-T1 H-MTD converts from 1001000BASE-T1 Automotive Ethernet to SGMII, allowing full-duplex traffic

sfp slot M-SFP-SXLC SFP Module Hirschmann M-SFP-SXLC 1000mb Multimode SFP Module , LC, GLABSDNV Rated,