Final answer:
It is true that one interface can have multiple IPv6 addresses, which encompasses link-local, unique local, and global unicast addresses.
Step-by-step explanation:
The statement that multiple IPv6 addresses can be assigned to one interface is true. In IPv6, an interface could have a unique local address (ULA), a link-local address, and one or more global unicast addresses. This flexibility supports various functionalities, including address autoconfiguration, easier multi-homing, and improved privacy.
Link-local addresses are used for communication within the local subnet and never forwarded by routers. Global unicast addresses are used for communication over the Internet and are similar to IPv4's public addresses. A unique local address (ULA) provides local communications and is similar to the private address space in IPv4.
The ability to assign multiple addresses to a single interface is one of the enhancements that IPv6 provides over IPv4, and enables more efficient routing and network management.