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Can anyone tell me what is edge node in Hadoop?

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The interfaces between the Hadoop clusters any external network are called the edge nodes. These are also called gateway nodes as they provide access to-and-from between the Hadoop cluster and other applications. Administration tools and client-side applications are generally the primary utility of these nodes. 

If you want to learn Hadoop, I recommend this Hadoop Training program by Intellipaat.

Also, watch this YouTube tutorial on Hadoop:

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