Which IPv6 prefix range identifies multicast addresses rather than unicast?

The correct answer is FF00::/12 because this prefix range is specifically reserved for IPv6 multicast addresses. Multicast addresses are used to send a single packet to multiple destinations simultaneously. Let's look at why the other options are incorrect: 2000::/3 is the global unicast address range, used for publicly routable addresses on the internet. FC00::/7 is the Unique Local Unicast Address (ULA) range, used for private addressing within an organization, similar to IPv4 private IP addresses. FE80::/10 is the link-local unicast address range, used for communication only on the local link and not routable beyond it.