Therefore, there are 2,097,152 possible network addresses and 256 possible local host addresses. In other words, the first octet of a Class C address is in the range 192 to 223. When deciding which network address class to use, you need to consider how many local hosts there will be on the network and how many subnetworks there will be in the organization. If the organization is small and the network will have fewer than 256 hosts, a Class C address is probably sufficient. If the organization is large, then a Class B or Class A address may be more appropriate.
Machines read addresses in binary code.
Addresses with leading zeros are interpreted as octal, and numerals in octal cannot contain 8s or 9s. This means that all machines with a Class C address of 192.9.200. This results in a network flooded with requests to nonexistent machines. Similarly, problems occur for Class B addresses such as 129.5.0.0. All machines with a Class B address of 129.5.