NIELIT 2017 DEC Scientific Assistant A - Section B: 27

Question

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

• A. $230.0.0.0$
• B. $130.4.5.6$
• C. $230.7.6.5$
• D. $30.4.5.6$

Comments

Class B range is 128-191

Option B is correct

Answer 1

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

 

130.4.5.6 Class b address

 

Answer 2

For class B addressing it should start with “10” 

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