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Hello Vishav Mehta ,
As you mentioned here that subnet is 12.1.1.0 and you want 2 valid ip address which you can assign to any machine . To perform this task , you have to use subnet mask of /30 . By which block size is 4 and valid ip address are 2 because 1 is network and 1 is broadcast ip address .
12.1.1.0/30
128 64 32 16 8 4 2 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 0 0
By using /30 we have only 2 host bits . so we have only 4 possible values , which are as follows ----
00 ----- 12.1.1.0/30 network ip address ( not assignable to any host )
01 ----- 12.1.1.1/30 valid ip address (1) ( assignable to any host )
10 ------ 12.1.1.2/30 valid ip address (2) ( assignable to any host )
11 ----- 12.1.1.3/30 broadcast ip address ( not assignable to any host )
Hope it will be helpful for you .
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