Hi everyone! My name is Leonid, I have a question. Cisco produces a wide range of devices (switches, routers etc) with different hardware and feature-sets for a wide range of purposes. And when, for example, a large ISP needs an MPLS-switch, I'm sure, there is always somebody expert in choosing suitable model, hardware, feature-set with a lowest possible price, exactly for the purpose. So please, does anybody know, how this business (profession) is called, how to learn it and maybe there is a certification line for this kind of knowledge? Or it is always just an experience?? Thank you!
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