Final answer:
ICMPv6 is the protocol that supports Stateless Address Autoconfiguration (SLAAC) for dynamic assignment of IPv6 addresses to a host.
Step-by-step explanation:
The protocol that supports Stateless Address Autoconfiguration (SLAAC) for dynamic assignment of IPv6 addresses to a host is ICMPv6 (Internet Control Message Protocol version 6).
SLAAC allows hosts to autoconfigure their IPv6 addresses without the need for a central server. When a host is connected to an IPv6 network, it sends a Router Solicitation message using ICMPv6 to discover the routers on the network. The routers respond with a Router Advertisement message containing the network prefix and other configuration information. The host then combines the network prefix with its interface identifier to form its IPv6 address.