What command is used to set a password A. ip address B. undo shutdown C. reset saved-configuration D. set authentication-mode password

To determine the correct command used to set a password among the given options, we should analyze what each option represents in a typical networking or command-line environment.

1. Understanding Each Option:

   • A. ip address: This command is typically used to assign an IP address to an interface rather than setting a password.
   • B. undo shutdown: This command is usually used to enable an interface that has been disabled; it does not relate to password management.
   • C. reset saved-configuration: This command is used to reset the device configuration to its saved state, which usually does not involve setting passwords.
   • D. set authentication-mode password: This command suggests the configuration of an authentication mode that requires a password.

2. Correct Command Identification: Based on the analysis, the command that directly relates to setting a password is D. set authentication-mode password. This indicates the intention to enforce password protection for accessing or authenticating a device.

Final Answer

The correct command used to set a password is D. set authentication-mode password.