<networking> A term used to describe a network node running both IPv4 and IPv6 protocol stacks (or possibly others) at the same time. Such a machine can act as a protocol converter between the two networks.
A node without dual-stack support can relay traffic in a protocol it does not support natively by use of tunnelling.
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Nearby terms: Dual In-line Memory Module « Dual In-Line Package « dual ported « dual-stack » Dual Tone Multi Frequency » duck typing » DUEL