Networks·41,454 discussions

subnet question

Tags: Networking

i was following Robb Jones ip and subnetting workbook v2.0 , there the instructor has used number of subnets = 2^n

i solved al the problems

later while looking for books on networks i found subnetting workbook v1.1 by Robb Jones , the same producer, here he was using 2^n-2 for number of subnets .

now i am in total confusion , did some reseach few minutes back again this blog has also used 2^n-2 for subnets , link :- https://www.techrepublic.com/article/subnetting-a-class-c-network-address/

according to latest books and comptia network+ , everyone is using 2^n for determining number of subnets ,, which one is the correct formulae plz help me

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