What is default value for all?

With the start profile parameter service/hostname you can also determine the IP address / host name to which the Web service port should be connected, to limit accessibility in the network.

What is default value for all?
A . /255.255.255.0
B . /192.168.1.0
C . /192.168.1.1
D . /0.0.0.0

Answer: D