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Chapter 3. Integration and Transition Technologies > Available Mechanisms
3.2. Available Mechanisms
The following sections provide an overview of the currently available integration mechanisms, sorted by category. Some of these mechanisms continue to be refined by the engineering community, but most of them have already been used in many production deployments worldwide.
3.2.1. Dual-Stack
Dual-stack is nothing new. If you were a Novell NetWare shop, you ran IPX (internetwork packet exchange) along with IPv4 on the same interface; or if you have Macs, you are running AppleTalk along with IPv4. In this dual-stack approach, we are running two versions of IP on the same interface.
