Which of the following configuration schemes in IPv6 allows a client to automatically configure its own IP address with or without IPv6 routers?

Stateless autoconfiguration (SLAAC), defined in RFC 4862, allows a host to derive its IPv6 address by combining a network prefix (received from a router advertisement) with a self-generated interface identifier. Critically, it can also operate without a router by forming a link-local address, making it functional with or without router infrastructure. No server-side state is maintained, which is why it is called 'stateless'.

Stateful autoconfiguration (DHCPv6) requires a DHCPv6 server to assign and track address state, meaning it cannot function independently without server infrastructure.

'Stateless configuration' is not a recognized standard IPv6 addressing scheme - it is a non-standard distractor term.

'Stateful configuration' is not a recognized standard IPv6 addressing scheme - it conflates the concept with stateful DHCPv6 without using its proper name.