CREST Practitioner Security Analyst (CPSA) Practice

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Which range of IP addresses is classified as Reserved Internal IPs?

  1. 192.0.0.0/8

  2. 10.0.0.0/8

  3. 127.0.0.0/16

  4. 198.51.100.0/24

The correct answer is: 10.0.0.0/8

The range of IP addresses classified as Reserved Internal IPs corresponds to the private IP address range defined by the Internet Engineering Task Force (IETF). The range designated for private use in the context of internal networking is 10.0.0.0 to 10.255.255.255, which is represented as 10.0.0.0/8. This particular range of addresses is not routable on the public internet and is meant for use within private networks. It allows organizations to create their own internal networks without consuming public IP address space. The other ranges listed do not fit the criteria for Reserved Internal IPs. The 192.0.0.0/8 range, while it includes some reserved addresses, does not include private IPs allocated for internal use. The 127.0.0.0/16 range is reserved for loopback addresses, typically used for local testing and not for internal networking. Finally, the 198.51.100.0/24 range is part of the documentation and example address space, which is also not intended for private internal networking use. Thus, the private IP range of 10.0.0.0/8 is the correct classification for Reserved Internal IP

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