On 6/6/2008 12:15 PM, Todd Walton wrote:
Okay, just kidding. I don't get it. Now I'm looking at a subnet ID
of 167.190.1.0 with a mask of 255.255.248.0.
ID and Mask are:
10100111 10111110 00000001 00000000
11111111 11111111 11111000 00000000
This puts a network identifier bit in what the mask says should be a
host bit. That doesn't make sense. Maybe my information is wrong?
Or maybe there's some convention I'm not aware of, like, you just
assume that the third octet in the net identifier is 00001000? No,
that doesn't make sense either.
You're right. The network ID is in the range of host IPs. If that's what
was intended, all is fine. I've sometimes seen people refer to a network
as a representative host IP along with a subnet mask. Or maybe someone
made a mistake and it's really a /24.
$ ipcalc 167.190.1.0 255.255.248.0
Address: 167.190.1.0 10100111.10111110.00000 001.00000000
Netmask: 255.255.248.0 = 21 11111111.11111111.11111 000.00000000
Wildcard: 0.0.7.255 00000000.00000000.00000 111.11111111
=>
Network: 167.190.0.0/21 10100111.10111110.00000 000.00000000
HostMin: 167.190.0.1 10100111.10111110.00000 000.00000001
HostMax: 167.190.7.254 10100111.10111110.00000 111.11111110
Broadcast: 167.190.7.255 10100111.10111110.00000 111.11111111
Hosts/Net: 2046 Class B
Karl
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