Final answer:
The IPv6 address prefixes FF02::/16 and FE80::/10 are not routable. FF02::/16 is used for IPv6 multicast addresses, and FE80::/10 is for IPv6 link-local addresses. The other prefixes, 2001:DB8::/32 and 2401:4900::/32, are technically routable, with 2001:DB8::/32 reserved for documentation.
Step-by-step explanation:
Non-Routable IPv6 Address Prefixes
In the world of IPv6 networking, certain address prefixes are designated for specific uses, and not all of them are meant to be routable over the public Internet. Among the listed options, the prefixes FF02::/16 and FE80::/10 are not globally routable. The FF02::/16 prefix is used for IPv6 multicast addresses, which are local to a specific subnet and are not meant to be routed. The FE80::/10 prefix belongs to IPv6 link-local addresses, which are also non-routable and are used for communication on a single network segment. On the other hand, the addresses 2001:DB8::/32 and 2401:4900::/32 represent routable IP blocks. Specifically, 2001:DB8::/32 is designated for documentation purposes and should not appear in the public Internet, but it is technically routable. Meanwhile, 2401:4900::/32 is a valid, globally routable IPv6 prefix.