CREST Practitioner Security Analyst (CPSA) Practice

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Which IP range corresponds to Class C addresses?

128.0.0.0 - 191.255.0.0
0.0.0.0 - 127.0.0.0
192.0.0.0 - 223.255.255.0
224.0.0.0 - 239.255.255.255

The correct answer is: 192.0.0.0 - 223.255.255.0

Class C addresses are characterized by their IP range, which spans from 192.0.0.0 to 223.255.255.255. This class is commonly used for small to medium-sized networks, as it allows for a greater number of networks to be created with a limited number of host addresses available within each network. The significance of the Class C range lies in its subnetting capabilities and its role in IP address allocation. Each Class C network can support up to 254 usable host addresses, making it suitable for many organizations that do not require the exhaustive range of addresses available in other classes. In the options provided, the range corresponding to Class C is correctly identified, reflecting the classification system established in the original Internet Protocol standards. This foundational knowledge is essential for understanding network design and address management in IT infrastructure.