yes you are right with IP subnet-zero and the concept of this is to allow you to use the '0' and '1' subnet portion of the address. I am still puzzeled why I can ping the network address even no device is using that IP address.
Because this is a broadcast address on the segment--a long time ago, in a galaxy far away, people used to use the all 0's network address as the broadcast, and the all 1's wasn't used. Then along came cidr, and the world was changed for the better (theoretically). Now, we keep the concept of the all 0's network address as a broadcast, although very few hosts use it.
And this has been your trivia lesson for the night.
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