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Understanding IP Addressing [Part-2]

by pritam on 27 Dec 2016
Content covered: 

Classful Network Architecture

Why you have not subtract 2 from NIDs of B and C class?

shashankshek's picture

Because he already have eliminated the fixed bits from couting the total network ID i.e:

For Class B:

fixed bits- 2(1,0)

total network bits- 16

total manipulative bits = 16-2

So, Total Network ID's = 214

Similarly for class C, total network id's = 221.

sardendubharti's picture

becuase he mentioned that the two NID adress were eliminated only for class A network, because the first and last is used for noIP/invalidIP  and loopback adress respectively 

Range of class D is 224-239.

is class B range from 1-126 or from 1-125. In last video you said it was from 1-125 and in the above it is said as 1-126?