How many host addresses are available in the /28 network?
A.
6
B.
14
C.
28
D.
30
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Ans. is D 30
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Full netmask lenght is 32 bits. In the question netmask has 28 bits, so for hosts you can use 4 bits only.
You can have 16 addresses on 4 bits. One for network address, one for broadcast address. So you have only 14 addresses for hosts.
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2n -2 = 2(4) – 2 = 14
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