Which network mask should you place on a Class C address to
accommodate a user requirement of two subnetworks with a
maxximum of 35 hosts on each networks

A. 255.255.255.192

B. 255.255.255.224

C. 255.255.255.240

D. 255.255.255.248

Answer Posted / jitendera kumar sinha

ok we need 35 host and we have a class c address
now
2^n-2>=35
n=required bit for host
thus
n=6
that is we need six bit for host forn geting 35 hest per n/w
now how many spare bit we have
that is 8-6=2
thus take it for the n/w
then what is the mask of that sunated
i.e
128 64 32 16 8 4 2 1
1 1 0 0 0 0 0 0
that is mask of the last octect is 128+64=192
scince it is a class c address
thus complete mask shoud be
255.255.255.192
hence answer is a
no need to option byse calulation some above caluted it
option bise a wrong approch that was
jitendera kuamr sinha

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