ASP.NET Authorization What is * and? I mean?

Question

In ASP.NET, I often see (and copied the following), but never understood the difference between * and? characters.

eg

<system.web>
  <authorization>
    <deny users="*" />
    <deny users="?" />
  </authorization>
</system.web>

Just wondering, can someone tell me the difference?

Greetings.

Answer 1

? means anonymous users.

* means all users.

Answer 2

* is a wildcard meaning "everyone" ,? means anonymous users.