A subnet is a logical division of a network of connected devices based on _____________.

• A. Host Names
• B. MAC Addresses
• C. IP Addresses
• D. Subnet Masks

Answer: (C)

Subnetting centers on organizing devices by the IP address they use. Devices are grouped into subnets because they share the same network prefix in their IP addresses, and the subnet mask shows which bits of that address represent the network portion versus the host portion. This prefix is what routers use to determine how to route traffic between subnets. Host names are just human labels and don’t influence routing, while MAC addresses identify a device on a single local link and don’t define subnet boundaries. The boundary itself is revealed by the IP address together with the subnet mask, so the logical division is based on IP addresses.