Can IP v4 and IP v6 share a single physical Ethernet?

Posted by sleske on Super User See other posts from Super User or by sleske
Published on 2011-02-06T19:57:34Z Indexed on 2011/02/06 23:29 UTC
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networking

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IPv6

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tunnel

I keep reading about the transition from IP v4 to IP v6, and the possible advantages and problems. One thing that keeps popping up is "dual-stack" networking, meaning (I believe) a host can speak both IPv4 and IPv6.

I don't quite understand how this works, however. Can a host actually transmit using IPv4 and IPv6 at the same time over the same physical Ethernet (like e.g. HTTP and FTP can be used simultaneously)? Or is the physical network strictly IPv4 or IPv6, with the "other" protocol sent via tunneling?

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