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Can network id's be 0 or 255?


ala888
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Its common knowledge that a host portion of an IP address cannot be 0 or 255

How do you figure? Each of the 4 numbers of an IPv4 address is an 8-bit number, meaning there are 256 possible values, meaning that the possible values are 0 through 255 inclusive.
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A network ID is not an IP address. The network ID will end in .0, but an IP address can also end in .0. It's also perfectly fine to have 0 or 255 as the second or third octet. IPs with the first octet 0 or 255 are reserved, but they are still valid IPs.

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