![]() 172.24.65.128 What if they give you a slash notation instead of the whole subnet mask. 3125 and multiply 128 (increments) X 1 (your whole number) = 128 128 is your network number. 172.24.65 we don’t worry about here Take 256 minus the 128 mask=128 (increments of 128 to be exact) Magic number!!! Take 168 and divide by 128=1.3125 all you care about is the whole number here. 5 and multiply 8 (increments) X 22 (your whole number) = 176 176 is your network number. 185 Take 256 minus the 248 mask = 8 (increments of 8 to be exact) Magic number!!! Take 180 and divide by 8 = 22.5 All you care about is the whole number here. 172.26 we don't worry about, and same with the. ![]() ![]() ![]() Take 256 minus the subnet mask= magic number. Cutting Down The Time Spent On Subnetting Questions Figuring out the number networks increment by (Magic number).
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