which mask can be used?

When adding an Address Book entry in aNetScreenfor a single device, which mask can be used?

A.
0.0.0.0

B.
192.168.0.0

C.
255.255.255.255

D.
The host’s subnet mask i.e. 255.255.255.224

Explanation:

TheNetScreenScreenOSclassifies the addresses of all other devices by location andnetmask.
Each zone
possessesits own list of addresses and address groups. Individual hosts have only a single IP address defined and therefore, must have anetmasksetting of
255.255.255.255 (which masks out all but this host).
Subnets have an IP address and anetmask(for example, 255.255.255.0 or 255.255.0.0). Before you can configure policies to permit, deny, or tunnel traffic to and from individual hosts and subnets, you must make entries for them inNetScreenaddress lists, which are organized by zones.