5,812 views
3 votes
3 votes

What is IP class and number of sub-networks if the subnet mask is $255.224.0.0$?

  1. Class $A$, $3$
  2. Class $A$, $8$
  3. Class $B$, $3$
  4. Class $B$, $32$

3 Answers

Best answer
5 votes
5 votes
Subnet mask is 11111111.11100000.00000000.00000000

here 8 bit for network ( all 8 ones )

And 8 bit for network id belong to class A

And next 3 ones used for subnet . Since 3 ones so number of subnet is 2^3=8.

So answer is b
selected by
3 votes
3 votes
Answer B) class A ,8

 we calculate subnetwork 2^3=8
1 votes
1 votes
Given mask is 255.224.0.0

No. of 1's are 11.

So no. of subnetworks = (given mask - default mask)

                                  = 11- 8 = 3

 Answer is A.
Answer:

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