Final answer:
The topic of this question is subnetting practice and the correct answer is C) Subnetting practice.
Step-by-step explanation:
The topic of this question is subnetting practice. Subnetting is a technique used in computer networks to divide a large network into smaller subnetworks called subnets. It involves determining the network address and subnet mask to assign IP addresses and configure routing tables.
Subnet masks are represented using decimal numbers separated by periods. For example, a subnet mask of 255.255.255.0 means that the first 24 bits of an IP address are the network address, and the remaining 8 bits are used for host addresses within the subnet.
In this match-up, the correct answer would be C) Subnetting practice, as it specifically refers to finding the decimal subnet mask that matches the given prefix.