Final answer:
NDP in stateless DHCPv6 provides clients with network information such as router discovery, link-layer addresses, DNS server addresses, and network prefixes for address configuration. Clients use this information to autonomously configure their network settings and connect to the Internet.
Step-by-step explanation:
In stateless DHCPv6, the Neighbor Discovery Protocol (NDP) provides important network configuration details to a client/host. Unlike in stateful DHCPv6 where a server assigns IP addresses, in stateless DHCPv6, hosts generate their own IP addresses using the Stateless Address Autoconfiguration (SLAAC) mechanism. NDP complements this by providing additional network information. NDP helps with the discovery of routers, determining link-layer addresses of other hosts, locating available DNS servers, and the Prefix Information Option which informs the host of the network prefixes that are on-link and available for autonomous address configuration.
One crucial aspect of NDP is the Router Advertisement (RA) message, which includes important details like prefix information and gateway addresses. With this information, a client is able to configure its own IP address, and understand how to route packets to reach the broader Internet. This makes NDP an essential component for seamless network integration in an IPv6 environment.