Rackmount switch poe switch switching ports 28 10 gigabit ethernet ports 4x sfp gigabit ethernet ports 24 x rj 45 switch type standalone management managed layer 2 network standards power over ethernet poe energy efficient ethernet link aggregation control protocol lacp link layer discovery protocol lldp spanning tree protocol stp vlan access control list acl quality of services qos broadcast storm control unicast storm control igmp snooping port m