enable
Transitions the command line interface from the highly restricted User EXEC mode into Privileged EXEC mode. This grants the administrator access to all show commands, debugging tools, and the ability to enter global configuration.
Quick Reference
Router>Router#disable or exitCLI Deployment Scenarios
Scenario 1: Standard Access (No Password)
On a factory-reset router, typing enable instantly grants administrative access without a security check.
Scenario 2: Secure Access
If the enable secret command has been configured, the router will pause and request authentication.
CCNA Exam Gotchas
The VTY Remote Access Block
If you SSH or Telnet into a Cisco switch remotely, you land in User EXEC mode (Switch>). If you type enable but no enable password has been configured globally, the switch will reject your request with the error: % No password set. Cisco completely blocks remote elevation to Privileged EXEC mode unless an enable password protects the device.