24 x 10/100/1000 Mbps RJ45 Ports + 4 x SFP IEEE 802.3az Energy Efficient Ethernet SNMP QoS VLAN ACL 19" Rackmount. Four small form-factor pluggable GBIC module slots (SFP). All RJ45 ports with Auto-MDIX and NWay auto-negotiation support. Complies with the IEEE 802.3az (Energy Efficient Ethernet EEE) specification. SNMP Management and Remote Monitoring (RMON). SNMP V1 V2 V3 with RMON groups 1 2 3 & 9. Supports VLAN (tag-based and port-based). 802.1X authentication and IP/MAC based Access Control Lists (ACL). Supports link aggregation (trunking).