What is the IPv6 multicast address that corresponds to all nodes?

The IPv6 multicast address that corresponds to all nodes in a local link is FF02::1. This address is specifically designed to reach all IPv6 nodes on the local segment of the network. When a packet is sent to this address, every IPv6-enabled device on the local link will receive the packet, which is essential for certain types of network communications where broadcasting to all devices is required.

This address operates within the link-local scope, meaning it is only relevant within the confines of the local network segment. Other options listed do not serve this purpose:

FF02::2 is designated for all routers on the local link, not for all nodes. FF00::1 is not a valid multicast address because multicast addresses must start with FF and are defined with certain format requirements. FF01::1 is intended for all nodes but within a specific scope of the network, seeking connectivity at the node-local level rather than the wider link-local scope.

Thus, FF02::1 stands out as the correct choice for communicating with all applicable nodes on the local link in an IPv6 network.