Which three items are required for configuring IPv4?

The configuration of IPv4 requires an IP address, a subnet mask, and a default gateway. The IP address is essential as it uniquely identifies a device on a network. The subnet mask determines the network portion and the host portion of the IP address, effectively defining how many devices can be on a particular subnet. The default gateway is critical as it enables communication with devices outside the local subnet, allowing access to the broader internet or other networks.

In this context, while DNS servers and hostnames play significant roles in network configurations, they are not strictly necessary for basic IPv4 functionality. The DNS server translates domain names to IP addresses, and the hostname is simply a human-readable label for a device within a network. However, without an IP address, subnet mask, and default gateway, a device cannot effectively participate in network communications. This is why the combination of an IP address, subnet mask, and default gateway is the correct choice for configuring IPv4.