He's full of it (not you, the HP rep), it just means that the printer isn't a standalone network printer. Some you can setup as a network printer via its own network inputs, it gets its own IP address and the works. Otherwise, you just hook it up to one of your systems and share the printer.
If you argue with an idiot he will drag you down to his level and beat you with experience.
I am not a fast writer.
I am not a slow writer.
I am a half-fast writer.