Trouble subnetting...

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Published on 2011-03-02T22:51:09Z Indexed on 2011/03/02 23:26 UTC
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subnet

I have to learn how to subnet by hand for a test. And I'm having real problems doing it. I keep getting stuck.

Here's an example:

138.248.184.17/18 - IP
255.255.192.0 - Subnet Mask
192 = 1100 0000 in binary
And I know 184 in the IP address is the "octet of interest".
OK I get that far...and then I'm lost.

I know I need to set the network bits of 192(I think?) to all 0 for the network ID and then to all 1 for the broadcast ID. Problem is how do I know which part of 11000000 is network and which part is host?

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