What does EUI-64 allow a device to generate in IPv6 networking?

EUI-64 allows a device to generate an interface identifier for an IPv6 address based on the device's MAC address. This process involves taking the 48-bit MAC address and modifying it to create a 64-bit identifier by inserting a specific sequence of bits and altering the universal/local (U/L) bit. This generated interface ID is then used in the construction of a global unicast or link-local IPv6 address.

This method helps ensure uniqueness on a local network as MAC addresses are globally unique identifiers assigned to network interfaces. Therefore, using EUI-64 allows for the automatic generation of addresses that comply with IPv6 addressing standards, making address management more streamlined and consistent.