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The "enable" and "configure" mode names are only symbolic - each device type has their it's own modes. In general, the "enable" mode means the 2nd highest possible CLI mode on the device, and the "configure" mode the 3rd highest possible CLI mode on the device (if the device type supports this). Taking Cisco as an example, the "user exec" mode would be 1st possible login mode, "privilege exec" would be the 2nd (enable) mode, and "configure mode" would be the 3rd (configure).
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