How many VTY user interfaces does a switch support

By default, a switch allows a maximum of five VTY users at a time. You can set the maximum number of VTY users allowed using the user-interface maximum-vty command. This maximum number can be set to 15 at most (a maximum of 15 VTY users allowed).
When the maximum number of VTY user interfaces is set to 0, no user (even NMS user) can log in to the switch.

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