ports : 24 x 10/100/1000base-t ports; 2x combo sfp (mini gbic) ) protocol :csma/cd data transfer rates: ethernet: 10mbps (half duplex); 20mbps (full duplex) fast e'net:100mbps (half duplex) ; 200mbps (full duple gig e'net: 2000mbps (full duplex);standards vlan :port-based vlan ,maximum number of vlan: 24 per device port trunks: 2 or 4 ports per trunk , 3 port trunks per device management: web-based configuration ,windows-based utility , configuration reset through software or hardware (reset button) transmission method : store-and-forward mac address table: 8k entries per device packet filtering/forwarding rates (half duplex):max 1,488,095 pps per port ram buffer : 400kb per device standards: ieee 802.3, ieee 802.3u, ieee 802.3ab, ieee 802.3z, 02.3 ansi/ieee 802.3 nway auto-negotiation,ieee 802.3x flow control dimensions : 440 x 210 x 44 mm (w x d x h) 19inch standard rack mounting si * auto mdi/mdix adjustment for all twisted-pair ports * 802.3x flow control for protection against data loss * port trunks for server/network backbone attachments * port-based vlan support to enhance security/network performance * 802.1p priority queues, port-based qos