Which command is used to validate the syntax of a configuration without applying the configuration?
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A. B. C. D.C
The correct answer is C. commit check.
The "commit check" command is used to verify the syntax of a configuration without applying the configuration to the device. This command is useful for validating configuration changes before applying them to the device, as it helps to prevent configuration errors from disrupting the network.
When you enter the "commit check" command, the Junos OS checks the configuration syntax and reports any errors or warnings that it finds. If the configuration syntax is correct, the system displays a message indicating that the configuration is valid.
It is important to note that the "commit check" command does not actually apply the configuration changes to the device. Therefore, any configuration changes made since the last successful commit will not be checked by the command.
The other options listed are incorrect:
A. "commit confirmed" is used to apply a configuration to the device, but with a time delay, during which you can revert to the previous configuration.
B. "commit synchronize" is not a valid Junos OS command.
D. "commit and-quit" is used to apply a configuration to the device and exit configuration mode.