What IPv4 class address is used for networks with about 250 nodes?

The correct choice of Class C addresses is based on the capacity they provide for network devices. Class C IP addresses are designed to accommodate smaller networks, typically allowing for up to 254 usable host addresses, as each Class C network has a default subnet mask of 255.255.255.0. This range is ideal for networks that require around 250 nodes, as it fits the requirement very well while also providing enough address space for additional devices if necessary.

In contrast, Class A addresses are meant for very large networks and offer a significantly larger range of host addresses—over 16 million—far more than what is necessary for a typical small network. Class D addresses are designated for multicast groups and do not serve as typical host addresses for standard networks. Class E addresses are reserved for experimental purposes and are not used for general networking, making them unsuitable for the described scenario. Therefore, Class C is the most appropriate choice for a network with approximately 250 nodes.