UGC-NET | UGC NET CS 2018 Dec – II | Question 8

An internet service provider (ISP) has following chunk of CIDR-based IP addresses available with it: 245.248.128.0/20 . The ISP want to give half of this chunk of addresses to organization A and a quarter to Organization B while retaining the remaining with itself. Which of the following is a valid allocation of addresses to A and B ?
(A) 245.248.132.0/22 and 245.248.132.0/21
(B) 245.248.136.0/21 and 245.248.128.0/22
(C) 245.248.136.0/24 and 245.248.132.0/21
(D) 245.248.128.0/21 and 245.248.128.0/22

Answer: (B)
Explanation: See Question 4 of https://www.geeksforgeeks.org/computer-networks-set-1/

Option (B) is correct.
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