单选题Which commands is necessary to permit SSH or Telnet access to a cisco switch that is otherwiseconfigured for these vty line protocols?（）Atransport type allBtransport output allCtransport preferred allDtransport input all
单选题
Which commands is necessary to permit SSH or Telnet access to a cisco switch that is otherwiseconfigured for these vty line protocols?（）
A
transport type all
B
transport output all
C
transport preferred all
D
transport input all
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