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  1. N6750B

    Subnetting...Shortcuts

    I see some good stuff on this page. Good meat for training! Consider this: IP: 172.21.22.1 /21 so mask is 255.255.248.0 Stack the mask on top of the IP.... 255.255.248.0 172. 21. 22.1 Find the octet in the mask that is not equal to 0 or 255. Call that octet the "Interesting Octet". So in...

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