下列哪一条命令是用来保存交换机的配置信息（）

下列哪一条命令是用来保存交换机的配置信息()

A.write

B.Copy running-config startup-config

C.Write NVRAM

D.Copy startup-config running-config

A.write

B.Copy running-config startup-config

C.Write NVRAM

D.Copy startup-config running-config

A.write

B.copy running-config startup-config

C.write NVRAM

D.copy startup-config running-config

A.write flash

B.copy running-config startup-config

C.write NVRAM

D.copy startup-config running-config

A.write

B.copy run star

C.write memory

D.copy vlan flash

A.write

B.copy run star

C.write memory

D.copy vlan flash

A.write

B.copy run star

C.write memory

D.copy vlan flash

A．write

B．opy run star

C．write memory

D．opy vlan flash

A.showrunning-config

B.showstartup-config

C.showbackup-config

D.showversion

A.更改终端设置、执行测试和查看系统信息

B.可以执行所有的用户命令、配置文件的保存和交换机的重启

C.配置接口的开启、关闭、接口速率、双工模式和接口描述等

D.配置交换机的全局参数，如主机名、enable口令、IP地址和默认网关等