A variety of switch and router technologies are entering the market and creating confusion among network professionals. New terms such as Layer 3 switching, Layer 4 switching, multilayer switching, routing switch, switching router, and Gigabit router are clouding the traditional distinctions between switches and routers. Furthermore, many wiring closet switches that traditionally employed simple Layer 2 switching are now offering Layer 3 switching functions or future options for Layer 3 capabilities. These changes make it difficult for network designers to understand and deploy effective network solutions.
It is clear that a new generation of Internet and intranet work processes are emerging and that users will benefit from both increased competition and new services. It is therefore important do demystify the hype and understand when and where Layer 3 switching is important by getting back to the basics.
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