RE: all zeroes/all ones used in host IP's...

[David Schwartz]

>  1. The relevant standard states that all IP addresses are
>     classified as one of classes A, B, C or D depending only
>     on the FIRST octet/byte thereof, as follows:
>
> 	0		Reserved
> 	1-127		Class A		 8 bit
> 	128-191		Class B		16 bit
> 	192-223		Class C		24 bit
> 	224-254		Class D
> 	255		Reserved

	Not anymore. You can no longer determine the number of bits in the network
versus host part of an IP address just by looking at the first octet. That's
the piece of information missing.

	DS