COMPTIA A+ Practice Exam

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Which IP range is considered private?

  1. Starts with 10.x or 172.16.x to 172.31.x or 192.168.x

  2. All addresses starting with 127.x.x.x

  3. All addresses starting with 169.254.x.x

  4. All addresses starting with 192.x.x.x

The correct answer is: Starts with 10.x or 172.16.x to 172.31.x or 192.168.x

The correct answer is A. IP addresses that start with 10.x.x.x, 172.16.x.x to 172.31.x.x, and 192.168.x.x are considered private IP addresses. These IP ranges are reserved for use within private networks and cannot be routed over the internet. Options B, C, and D are incorrect: - Option B states that all addresses starting with 127.x.x.x are private, but in reality, the 127.x.x.x range is reserved for loopback addresses and is not considered private for normal network use. - Option C mentions addresses starting with 169.254.x.x. These addresses fall under the Automatic Private IP Addressing (APIPA) range, which are automatically assigned to network interfaces when a DHCP server is not available. They are not part of the commonly recognized private IP ranges. - Option D states all addresses starting with 192.x.x.x are private. While 192.x.x.x is a common private IP range, not all 192.x.x.x addresses are private. Only addresses starting with 192.168.x.x are designated as private IP addresses. Therefore, A is the correct choice as it correctly identifies the IP ranges that are considered private

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