Which of the following is NOT a private IPv4 address range?

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Study for the CCST Cybersecurity Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which of the following is NOT a private IPv4 address range?

Explanation:
Private IPv4 addresses are reserved for internal networks and aren’t meant to be reachable on the public Internet. The well-known private ranges are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. The address 198.51.100.0/24 isn’t in those ranges—it’s part of the documentation/test address space (TEST-NET-2) used in examples. So it’s not a private range, while the others are.

Private IPv4 addresses are reserved for internal networks and aren’t meant to be reachable on the public Internet. The well-known private ranges are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. The address 198.51.100.0/24 isn’t in those ranges—it’s part of the documentation/test address space (TEST-NET-2) used in examples. So it’s not a private range, while the others are.

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