... another switch which is already in a looping status· MAC filtering per port secures access to each port· MAC freeze· Port security, port isolation, port mirroring ... SNMP trap group· RMON four RMON groups 1, 2, 3, 9 (history, statistics, alarms, and events) for enhanced traffic management, ... · RFC1643 Ethernet MIB· RFC1757 RMON group 1, 2, 3, 9· RFC2011 IP MIB· RFC2012 TCP MIB· RFC2013 UDP MIB· RFC2233 ...