You want to minimize the number of IP addresses and subnets in use. How should you configure your tunnel interface?

A.
Configure the tunnel interface with an IP address with a 32 bit subnet mask

B.
Configure the tunnel interface with an IP address with a 30 bit subnet mask

C.
Configure the tunnel interface as unnumbered and place interface in the same zone as the designated

D.
Configure the tunnel interface as unnumbered, but place the tunnel interface in a different zone that the designated interface

Explanation:

The tunnel interface can be numbered or unnumbered. If it is unnumbered, the tunnel interface borrows the IP address from the default interface of the security zone in which you created it. Note: Only a tunnel interface with an IP address andnetmaskcan support policy-based NAT.