I could use some help with this problem: An ISP is granted the block 80.70.56.0/

Question

I could use some help with this problem:


An ISP is granted the block 80.70.56.0/21. The ISP needs to allocate addresses for two organizations each with 500 addresses, two organizations each with 250 addresses, and 3 organizations each with 50 addresses. Give a table that shows the range of addresses allocated to each organization. For each of the blocks (the 7 organizations and the unused block(s)), indicate the size of the block, the first address in the block, and the last address in the block using CIDR notation.

I will rate lifesaver for a well-explained answer! Thanks for your effort!

Explanation / Answer

bloack 1st adress lies from:-80.70.56.0/23 to 80.70.57.255/23

bloack 2nd address lies from:-80.70.58.0/23 to 80.70.59.255/23

bloack 3rd address lies from:- 80.70.60.0/24 to 80.70.60.255/24

bloack 4th address lies from:- 80.70.61.0/24 to 80.70.61.255/24

bloack 5th address lies from:- 80.70.62.0/26 to 80.70.62.63/26

bloack 6th address lies from:- 80.70.62.64/26 to 80.70.62.127/26

bloack 7th address lies from:- 80.70.62.128/26 to 80.70.62.191/26

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