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So what on earth is software defined networking or SDM?

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In this video, which you can find on YouTube, Martin Casado, who is seen as the father of SD in an

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open flow and developed ethane as part of his thesis at Stanford University says, I don't know what

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SD is.

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It's kind of become this umbrella term used for multiple visions of software defined networking, some

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of which don't include open flow at all.

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He says, as an example, that it's become a general term, as if all networking is software defined

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networking.

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That becomes tough.

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Then, if the people involved in the original development have said that the term has become generalized.