Which of the following summarized subnets represent routes that could have been created for CIDR’s goal to reduce the size of Internet routing tables?

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Which of the following summarized subnets represent routes that could have been created for CIDR’s goal to reduce the size of Internet routing tables?

10.0.0.0 255.255.255.0
10.1.0.0 255.255.0.0
200.1.1.0 255.255.255.0
200.1.0.0 255.255.0.0

Explanation: CIDR’s original intent was to allow the summarization of multiple Class A, B, and C networks to reduce the size of Internet routing tables. Of the answers, only 200.1.0.0 255.255.0.0 summarizes multiple networks.