When you are looking for something, like a piece of hardware, and you don't know where to start looking, it is always useful to have a good set of tools.
For example, I wanted to find what IP address that a new UPS device was using. I could not locate it in the DHCP tables and figured it must have a static IP address. The administration tools could not access it via the USB cable, so I needed to brute force search for the IP address. What I would do for an IP scanner right then? Code one!
