Cisco Certified Network Associate (CCNA) Practice Exam 2025 - Free CCNA Practice Questions and Study Guide

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What is the appropriate summarization for the routes 10.0.0.0, 10.0.1.0, 10.0.2.0, and 10.0.3.0?

10.0.0.0 /24

10.0.0.0 /22

To determine the appropriate summarization for the routes 10.0.0.0, 10.0.1.0, 10.0.2.0, and 10.0.3.0, you need to analyze the addresses in binary to find the common prefix.

The binary representation of the addresses is as follows:

- 10.0.0.0 → 00001010.00000000.00000000.00000000

- 10.0.1.0 → 00001010.00000000.00000001.00000000

- 10.0.2.0 → 00001010.00000000.00000010.00000000

- 10.0.3.0 → 00001010.00000000.00000011.00000000

When comparing these, the first 22 bits (00001010.00000000.000000) are common across all four addresses. Therefore, they can be summarized to the network address 10.0.0.0 with a subnet mask of /22. This summarization encompasses all addresses from 10.

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10.0.0.0 /26

10.0.0.0 /21

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