On Sunday 25 August 2002 03:56 pm, you wrote: > Frank, > > I think this is CIDR notation for subnet masks. > > A subnet mask of 255.255.255.0 is really the 10-base notation of a > binary masking system: 11111111.11111111.11111111.00000000. (Notice > 11111111 equals 255, and 00000000 equals 0.) The 1s indicate > which part of the number is the network, and the 0s represent the > machine number. > > The mask is always in two distinct pieces, so 11111111.11111111. > 11111111.11000000 is possible, but never something intermixed like > 11111111.11001100.10101000. So if you know the last 6 bits are the all > 0s (for machine address), you also know then remaining 26 bits are all > 1s and represent the network address. > > CIDR notation takes advantage of this numbering trick to represent the > whole submask by only counting how many bits represent machine numbers. > So 192.168.0.1/8 is 192.168.0.1/11111111.11111111.11111111.00000000 > or 192.168.0.1/255.255.255.0. > > Clear as mud? > > Miark > > > In some previous posts I have noticed people refering to their IP address > > range as xxx.xxx.xxx.xxx/xx. > > > > Just curious as to what the /xx refers to. Is it some type of range? lmao; Clear as mud? >
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