How is an active visitor different from an identified visitor?

What should be enabled on a Pardot form if an Administrator wants to sign many people up on the same computer at a trade show booth?

LenoxSoft enabled the "Always Display Form After Submission" setting on their Pardot form.
What would be the expected behavior if a prospect refreshes the page after initially submitting the form?

A Pardot administrator wants to gather a prospect's company name and Job title, but only once they have captured prospect's first name, last name and email address in a previous form submission.
Which feature should they use?

When do prospects sync to your CRM?