... .1p,ToS,DifferServMulticast managementIGMP,DVMRP,PIM-SM,PIM-DMNetwork managementCLI,WEB ,supportTelnet,v1,v2,v3 SNMP, support SysLog1,2,3,9four ... group RMON, support MIB portSafety managementSupport main/spare switch, Support hot swaps, Support HSRP,VRRPSupply voltageAC 200-240V,50 ...