CISCO - HIGH PERFORMANCE MIXED MEDIA GIGABIT ETHERNET INTERFACE MODULE - SWITCH - 48 PORTS - MANAGED - PLUG-IN MODULE (WS-X6748-SFP). KEY FEATURES : DEVICE TYPE : SWITCH - 48 PORTS - MANAGED ENCLOSURE TYPE : PLUG-IN MODULE PORTS : 48 X GIGABIT SFP JUMBO FRAME SUPPORT : 9216 ROUTING PROTOCOL : HSRP, VRRP REMOTE MANAGEMENT PROTOCOL : SNMP 1, SNMP 2, RMON 1, RMON 2, RMON 3, RMON 9, SNMP 3 FEATURES : FULL DUPLEX CAPABILITY, VLAN SUPPORT, CISCO GIGABIT ETHERCHANNEL , MANAGEABLE, RAPID SPANNING TREE PROTOCOL (RSTP) SUPPORT, MULTIPLE SPANNING TREE PROTOCOL (MSTP) SUPPORT, QUALITY OF SERVICE (QOS), PER-VLAN SPANNING TREE PLUS (PVST+), PER-VLAN RAPID SPANNING TREE (PVRST) COMPLIANT STANDARDS : IEEE 802.3Z, IEEE 802.1D, IEEE 802.1Q, IEEE 802.3AB, IEEE 802.1P, IEEE 802.3X, IEEE 802.3AD (LACP), IEEE 802.1W, IEEE 802.1S CONDITION : REFURBISHED. AVAILABILITY : IN STOCK. OUR WARRANTY : 30 DAYS.