A n Internet Service Provider (ISP) has the following chunk of CIDR-based IP addresses available with it: 245.248.128.0/20. The ISP wants 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?

245.248.128.0/21 and 245.248.128.0/22

245.248.136.0/21 and 245.248.128.0/22

245.248.132.0/22 and 245.248.132.0/21

245.248.136.0/24 and 245.248.132.0/21

A n Internet Service Provider (ISP) has the following chunk of CIDR-ba

1.	A n Internet Service Provider (ISP) has the following chunk of CIDR-based IP addresses available with it: 245.248.128.0/20. The ISP wants 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.	245.248.136.0/21 and 245.248.128.0/22
B.	245.248.128.0/21 and 245.248.128.0/22
C.	245.248.132.0/22 and 245.248.132.0/21
D.	245.248.136.0/24 and 245.248.132.0/21
Answer» B. 245.248.128.0/21 and 245.248.128.0/22

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