The U/L bit, being the seventh bit in the high order byte is set to a value of 1 to indicate a Global Scope. The process of a host automatically configuring it’s IP Address from the given prefix is known as Stateless Autoconfiguration.
Additionally the Router Advertisement message also contains the default hop count that Hosts should use. Neighbor Discovery NDP Hosts can use other Solicitation and Advertisement Messages for use with neighboring Hosts, such as Neighbor Solicitation and Neighbor Advertisement messages.
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