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Example: 1 Network address = 172.16.0.0, CIDR = 17 17 bits are ON, so subnet mask =255.255.128.0, No. of subnets= 2*1= 2, No. of hosts per subnet= 215-2(How this is possible? I didn't get it ) please explain or correct if it is wrong.?

author
SAURAV SHARMA
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author
Zibon kumar Zibon

Hello,

Number of host per subnet wrong

we know for ipv4 address total 24 octad 

where network bit 8+8+1 =9

host bit  = 15

number of host per subnet  2*15-2 = 32768-2

                                    = 32766

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