Rackmount switch switching ports 28 10 gigabit ethernet ports 4x sfp gigabit ethernet ports 24 x sfp 4 x rj 45 switch type stackable management managed layer 3 network standards flow control full duplex spanning tree protocol stp link aggregation lag port mirroring vlan mld snooping igmp snooping address resolution protocol arp quality of services qos weighted round robin wrr access control list acl energy efficient ethernet broadcast storm control