Which of the following describes the goal of an Extranet VPRN?

To reduce the number of VPRN tunnels required.

To allow routes to be exchanged between all, or selected, sites of one VPRN, and all, or selected, sites of a second VPRN.

To simplify the administration of multiple VPRNs.

To allow network access between the headquarter sites of each VPRN service and a shared VPRN service offered by a third party.