What range of first octet values defines Class C IPv4 addresses?

Class C IPv4 addresses are defined by a range of first octet values from 192 to 223. This classification is part of the traditional IPv4 address structure, which categorizes addresses into classes based on their first octet values.

Class C addresses are typically used for small networks, as they support up to 254 hosts. The first octet falling within the range of 192 to 223 indicates that the address is intended for smaller scale subnets, allowing for efficient IP address utilization in these scenarios.

Understanding the ranges of IPv4 classes is important in networking because it informs how addresses should be assigned and routed within networks. Class C addresses also have a subnet mask of 255.255.255.0 by default, which is crucial for network design and implementation. Hence, the range of 192 to 223 is specifically associated with Class C addresses, making this option the correct choice.