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Home > Archive > CCNA > August 2002 > Quick question on subnetting
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Quick question on subnetting
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| BlackEvoVII 2002-08-11, 2:26 pm |
| if given the class c address of 221.0.101.0
and i have a multiple segment LAN(10 segments), with say 150 nodes. If each segment has its own network identifier how is it possible to span that class c address over say 6 physical segments? i understand you could have, just for kicks:
221.0.101.0
221.0.101.16
221.0.101.32
etc...etc...
i dont understand how that above address would work on multiple segments. | |
| davidbeecken 2002-08-11, 4:09 pm |
| I dont understand what you mean. But I will try. When you specify the ip and network address on a router, it automaticly will know what network that device is on. Do you have a understanding of how to subnet? If not that might help a little bit. Basicly when you subnet you create multiple networks out of one. I wrote a paper on subnetting, http://www.ciscotrack.com/subnetting.html
that might help you. I wish I could say more, but I just dont understand what you mean exactly. | |
| benedict 2002-08-11, 4:55 pm |
| 221.0.101.0/28 is what ur using.
This will give you 14 subnets:
221.0.101.0 invalid
221.0.101.16
221.0.101.32
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221.0.101.208
221.0.101.224
221.0.101.240 invalid
use the first 10 for you 10 segments.
150 nodes divide by 10 is 15 nodes per segment.
since you borrowed 4 network bits then you have 4 host bits left.
2^4 - 2 = 14. you are short one node per segment.
However, for the 6 physical segments you can use 221.0.101.0/27. |
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