IPv6 ARP?

What this IPv4 vs. IPv6 address resolution interview question tests

This is a hard networking question that probes your understanding of fundamental protocol design differences. It asks you to compare how IPv4 and IPv6 solve the problem of mapping network-layer addresses to link-layer addresses—a critical function in any TCP/IP stack.

Strong answers distinguish between the mechanisms used in each protocol version, explain why those design choices were made, and can articulate the practical implications for network behaviour and performance. Interviewers are listening for clarity about the protocol layer involved, the specific address families each system handles, and concrete examples of how the resolution process works end-to-end.

• Link-layer versus network-layer address mapping
• Protocol-specific mechanisms for neighbor discovery
• Broadcast versus multicast in address resolution
• Stateless versus stateful neighbour information