Rackmount switch switching ports 52 gigabit ethernet ports 48 x rj 45 4 x sfp switch type stackable management managed layer 2 network standards access control list acl dhcp snooping quality of services qos igmp snooping mld snooping address resolution protocol arp port mirroring spanning tree protocol stp link aggregation control protocol lacp flow control device link detection protocol dldp loop detection sflow backplane bandwidth 104 gbs packet