When we summarize different network ip addresses into a single network.Is the CIDR value is less,equal or high,when we compare with given networks?

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Ex.171.161.151.1/16 171.161.152.2/17 171.161.154.3/17 what is the answer for this question?

 

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Easiest summarization possible for this range :-

171.161.0.0/16

for your network most correct summarization will be :-

171.161.144.0/20

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