# NIELIT 2017 DEC Scientific Assistant A - Section B: 27

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Which of the following is a class $B$ host address ?

1. $230.0.0.0$
2. $130.4.5.6$
3. $230.7.6.5$
4. $30.4.5.6$

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Class B range is 128-191

Option B is correct

First Octate define the range of classfull network

First few bit of first octate define the class full network. if first two bit (10) then it is class B,

10000000-128

10111111-191

Range:-  (128........130...............191)

130 is in range between 128 ....191

Hence only for option B, it starts with 10 Thus option B is the answer

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