In IPv6 address, hosts have at least two adresses. One if for global communication and the other one is local, having fe80::/10 as the prefix followed by an all zero 54 bit network id, and end with a 64 bit interface id. Local network is used when communicating with the machines in the LAN itself.
fe80::/10 prefix designates link-local addresses, providing a means for local communication. These addresses are crucial for local communication within the same network segment or link. They are commonly used under conditions where devices need to communicate within the same network segment or link.