Catalyst 3500(Ciso IOS系统)中配置PortFast生成树可选功能的命令格式是_

单项选择题

Catalyst 3500(Ciso IOS系统)中配置PortFast生成树可选功能的命令格式是______。

A) set spanning—tree portfastenable
B) set spanning—tree port fastenable
C) spanning—tree portfast default
D) set spanning—tree portfast default