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IP Routing

Posted on 2004-03-26
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Last Modified: 2010-04-11
Can anyone tell me if an IP Address of 204.245.255.163 with a subnet mask of 255.255.255.126 is a valid address to be routed on the internet?  And if so how is this accomplished, as far as I can tell it is an invalid address but I am no routing expert.   Thanks in advance for your help.
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Question by:jsmall562
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4 Comments
 
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Expert Comment

by:kabaam
ID: 10692286
nope not a good address for internet use.  It creates a broadcast and 99% of routers will kill broadcasts
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by:jsmall562
ID: 10692305
Kabaam -

Thanks for the quick response.  Quick follow up question - wouldn't it be 255.255.255.128 that would be the broadcast subnet?  to my understanding that is as far down as you are allowed to subnet.... meaning that .126 wouldnt even be a valid subnet.  Thanks for your help.
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kabaam earned 125 total points
ID: 10692386
I know binary and the basics of subnetting.


255.255.255.128
11111111.11111111.11111111.10000000
good subnet.... the 111s represent the network address... 0000s id the computer or node
Anytime the node address is all zeros, the address just represents the network subnet as a whole
anytime the node address is all ones, the address represents a broadcast on that subnet

255.255.255.126
11111111.11111111.11111111.01111110
that splits up the network address... I am pretty sure you can't do that.  the ones must not be split by zeros.
even if an IP could be split.... this would be a bad address for this subnet.

204.245.255.163
11001000.11100101.11111111.10100011
That would create a broadcast on this subnet
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Author Comment

by:jsmall562
ID: 10692395
kabaam - thanks for the help and the quick answer!  hope you enjoy the points
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