If a via-zone is created for a gatekeeper, enabling it to support an IP-IP gateway, are the functions of the gatekeeper dedicated to the via-zone?

A.
Yes, once the gatekeeper is configured for the via-zone it is dedicated to the via-zone

B.
Yes, but the via-zone gatekeeper can still communicate with other gatekeepers

C.
No, the gatekeeper can either be dedicated to the via-zone or support both the via-zone and other zones simultaneously

D.
No, the gatekeeper can support the via-zone and still function as a directory gatekeeper