单选题Which commands is necessary to permit SSH or Telnet access to a cisco switch that is otherwise configured 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 otherwise configured 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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