D-Link DES-3250TG Command Line Interface Reference Manual page 22

DES-3250TG Layer 2 Fast Ethernet Switch User's Guide
Figure 2-5. The Available Commands Prompt
The top-level commands consist of commands like show or config.
Most of these commands require one or more parameters to narrow
the top-level command. This is equivalent to show what? or config
what? Where the what? is the next parameter.
For example, if you enter the show command with no additional
parameters, the CLI will then display all of the possible next
parameters.
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