JUNIPER - EX 4500 4PORT 10G SFP+ UPLINK MODULE OPTICS (EX4500-UM-4XSFP). KEY FEATURES : DEVICE TYPE : EXPANSION MODULE FORM FACTOR : PLUG-IN MODULE NETWORKING : CONNECTIVITY TECHNOLOGY : WIRED DATA LINK PROTOCOL : 10 GIGABIT ETHERNET EXPANSION / CONNECTIVITY : EXPANSION SLOT(S) : 4 (TOTAL) / 4 (FREE) X SFP+ COMPATIBLE SLOTS : 1 X EXPANSION SLOT . .