A tech company is restructuring its network to improve efficiency and reduce IP address wastage. The network is divided into five segments: Research, Development, Sales, Customer Support, and Management.

The IP address requirements for each segment are as follows: Research needs $50$ IP addresses, Development requires $100$ IP addresses, Sales need $25$ IP addresses, Customer Support requires $30$ IP addresses, and Management needs $10$ IP addresses.

The company has a $/23$ network at its disposal. Using VLSM$,$ the network administrator decides to allocate subnet sizes based on these requirements. After the allocation, the administrator realizes there is a significant number of unused IP addresses.

What is the MOST likely reason for this inefficiency?