Why is class A IP address not suitable for a local area network?

Class A IP addresses are not suitable for local area networks (LANs) because they are designed for very large networks, supporting up to 16 million hosts per network. The vast address space is inefficient for small networks, which typically require far fewer IP addresses. Additionally, using Class A addresses in a LAN can lead to routing inefficiencies and increased complexity. Instead, Class C addresses, which support up to 254 hosts, are more appropriate for most LAN configurations.