... ~ 240 V 5. 6KV thunder proof UTT SG3124F 24 Port Gigabit Ethernet Switch with 2 SFP For Small &Medium Size Enterprise SG ... 3124F 24-Port Intelligent Managed Gigabit Switch 2-SFP Plus is a layer 2 wire- ... management, ARP/MAC/port/DHCP spoofing defense, port speed limit, syslog, 802.1Q, link aggregation, port mirroring, broadcast storm control, switch discover, etc. ...