Which method allows IPv4 and IPv6 packets to coexist in the same network?

Which method allows IPv4 and IPv6 packets to coexist in the same network?

• A. Dual-stack
• B. Tunneling
• C. Translation
• D. NAT64

Answer: (A)

Running both IPv4 and IPv6 on each device lets them coexist on the same network. This dual-stack approach gives every interface an IPv4 address and an IPv6 address, so hosts can send and receive traffic using either protocol as needed. Routers in the network carry routes for both protocols, DNS can return both A (IPv4) and AAAA (IPv6) records, and applications can use whichever path is available. This setup provides native support for both protocols without needing to encapsulate packets or translate addresses. Tunneling, by contrast, encapsulates one protocol inside another to traverse networks that don’t support it directly, which adds overhead and isn’t about true simultaneous operation on the same LAN. NAT64 and other translation methods enable communication between IPv6 and IPv4 hosts but rely on translators to convert between protocols rather than offering everyday dual-stack operation on every device.

Running both IPv4 and IPv6 on each device lets them coexist on the same network. This dual-stack approach gives every interface an IPv4 address and an IPv6 address, so hosts can send and receive traffic using either protocol as needed. Routers in the network carry routes for both protocols, DNS can return both A (IPv4) and AAAA (IPv6) records, and applications can use whichever path is available. This setup provides native support for both protocols without needing to encapsulate packets or translate addresses.

Tunneling, by contrast, encapsulates one protocol inside another to traverse networks that don’t support it directly, which adds overhead and isn’t about true simultaneous operation on the same LAN. NAT64 and other translation methods enable communication between IPv6 and IPv4 hosts but rely on translators to convert between protocols rather than offering everyday dual-stack operation on every device.