An Internet Service Provider (ISP) has the following chunk of CIDR-based IP add

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An 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?

Options:

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: Option A

-NA-

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