A network administrator has just entered new configurations into Router1. Which command should be executed to save configuration changes to NVRAM? | CCNA

     A.    Router1# copy running-config flash
     B.    Router1(config)# copy running-config flash
     C.    Router1# copy running-config startup-config
     D.    Router1(config)# copy running-config startup-config 
     E.    Router1# copy startup-config running-config

ANS: D