Catalyst 3500(Cisco IOS系统)启用STP的命令格式是 A: spanning-tree vlan＜vlans＞ B: no spanning-tree vlan＜vlan＞ C: set spantree enable＜vlans＞ D: set spantree disable＜vlans＞

Catalyst 3500(Cisco IOS系统)中配置UplinkFast生成树可选功能的命令格式是——。 A: set spantree uplinkfast enable B: set spantree uplinkfast enable rate C: spanning—tree vlanroot primary D: spanning—tree uplinkfast·

Catalyst 3500(Cisco IOS系统)中配置UplinkFast生成树可选功能的命令格式是 A: set spantree uplinkfast enable＜cr＞ B: set spantree uplinkfast enable rate＜station_updata_rate＞＜cr＞ C: spanning-tree vlan＜vlans＞root primary D: spanning-tree uplinkfast＜cr＞

Catalyst 6500(Catalyst OS(CatOS)系统)中配置Uplink Fast生成树可选功能的命令格式是( )。 A．set spantree uplink fast enable B．spanning-tree uplink fast C．spanning-tree vlan root primary D．spanning-tree uplink fast max-update-rate <0-32000>