Final answer:
To supernet the given addresses of 192.168.4.0, 192.168.4.1, 192.168.4.2, and 192.168.4.3, a /30 subnet mask (255.255.255.252) is used, which results in the single network address of 192.168.4.0/30.
Step-by-step explanation:
When you combine or supernet multiple network addresses, you are creating a larger network that encompasses all the individual addresses. Here, we have four contiguous IPv4 addresses: 192.168.4.0, 192.168.4.1, 192.168.4.2, and 192.168.4.3.
To supernet these addresses, we need to find a common network address and subnet mask that include all four. The addresses differ only in the last two bits of the host portion. We can combine them by using a subnet mask that masks out just those two bits. Having a subnet mask of 255.255.255.252 (or /30 in CIDR notation) allows for four individual IP addresses in one network.
Therefore, the network address for the supernet that includes all four of these addresses would be 192.168.4.0 with a subnet mask of 255.255.255.252 (or /30).