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Subnet Mask : - 255.255.240.0

$\underbrace{11111111 . 11111111 . 1111 }_{net\ id }\underbrace{0000.00000000 }_{host \ id}$

It is a class B network.For a class B network, the upper 16 bits form the network address and lower 16 bits are subnet and host fields.

of the lower 16 bits most significant 4 bits are 1111.This leaves 12 bits for the host number.So,4096(212) host address exists.

First and Last address are special so the maximum number of address

=4096-2=4094

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1 votes

The given subnet mask's encoded IP address is 
11111111111111111111000000000000
12 bits are available for the hostid ==> 2^12 possible hostids.

so the maximum number of hosts on this subnet is 2^12 = 4096 hosts.

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  • maximum number of host=2^n-2 .
  • we need to subtract 2 becz one is used for subnet id and other is used for DBA.
Answer:

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