You have a class B network 172.16.0.0. You use a 11 bits for subnetting. Which of the following is a correct range of Ip addresses that belong to the same network.
a. 255.255.8.1 to 255.255.14.254
b. 255.255.255.9 to 255.255.255.14
c. 255.255.17.1 to 255.255.22.254
d. 255.255.17.0 to 255.255.22.255
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Answer / indu
C
Explanation:
If you are using 11 bits for subnetting, you have 5 Netowrk Bits and 11 Node bits
From the subnetting formulas above:
M=5 N=11
The first range = 255.255.X.1 to 255.255.Y.254
where X = 2^(N-8)+1 and Y= 2^(N-8+1)-2
For the next ranges, just add 2^(N-8) at each end of the range
The first range = 255.255.9.1 to 255.255.14.254
2^(N-8) = 2^3 = 8
The second range = 255.255.17.1 to 255.255.22.254
so on and so forth.
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