2026 IT Essentials Full Practice Test

All of the specified address ranges are indeed commonly used for private networks in IPv4 addressing.

The first range, 192.168.0.0 to 192.168.255.255, is part of the Class C private IP address space, often utilized for small networks such as home networks and small business setups. This range supports a significant number of individual addresses suitable for local devices.

The second range, 10.0.0.0 to 10.255.255.255, represents the entire Class A private IP address space, which is suitable for larger organizations that require a vast number of IP addresses. This range can accommodate millions of individual addresses, making it ideal for large-scale networks.

The third range, 172.16.0.0 to 172.31.255.255, is designated for Class B private addressing. This range is typically used by medium to large organizations and provides a considerable number of addresses that can be useful for subnets in larger networks.

Since all three ranges are defined by the Internet Engineering Task Force (IETF) as private address spaces — meaning they are not routable on the public internet and are meant for use within private networks — they collectively encompass the commonly used ranges for