What does the IPv6 multicast address FF02::2 represent?

The IPv6 multicast address FF02::2 is specifically designated for communication with all routers on the local link. This address is part of the link-local multicast range, enabling devices to send messages efficiently to multiple routers without needing to know their individual addresses. By using this address, hosts can communicate routing information or other relevant data to all active routers in the local network segment.

The other options refer to different multicast groups: "All devices" would imply a broader range that includes all types of devices, which is not accurately represented by FF02::2. Additionally, "All switches" and "All hosts" pertain to different multicast addressing schemes; there are no specific multicast addresses that represent all switches or all hosts in a similar manner as FF02::2 represents all routers. Thus, the unique function of FF02::2 as the multicast address for all routers is what makes it the correct choice.