Which account is used to access a Junos device in factory-default configuration?
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A. B. C. D.A
The correct answer is A. root.
When a Junos device is in factory-default configuration, the only account available to access the device is the root account. This account has complete access to the device and can perform any configuration or management task.
The root account is a superuser account and should be used with caution as any changes made to the configuration of the device using this account can affect the device's operation and security. It is recommended to create additional user accounts with limited access privileges for routine management tasks.
It is important to note that the root account can be secured with a password or by using other authentication methods such as SSH key pairs or TACACS+ authentication.
In summary, when accessing a Junos device in factory-default configuration, the root account should be used to gain complete access to the device.