Are IP addresses with all zeroes in the first octet valid?
For example, can 0.1.2.0/24
be a valid subnet, with network address 0.1.2.0
, broadcast address 0.1.2.255
and an usable address range from 0.1.2.1
to 0.1.2.254
?
It looks like it should be valid, but it doesn't work, at least on Windows systems.
If it's not valid, then why?
Best Answer
RFC1122, Requirements for Internet Hosts -- Communication Layers, says: