hi Sankara,

A Hadoop environment will run the following
* 1 Name Node (MAster)
* One JobTracker (master for mapreduce)
* One Secondary NameNode
* Multiple Data nodes (where data is actually stored)
* Multiple TaskTrackers (slaves for Jobtracker)

Your tutor might have taken you through the entire setup and talked about the various components of Hadoop.

Thanks

Hello Sankara,

As long as your networks configured to communicate with each server or cluster then you can place hdfs or map reduce servers in different subnet.

Thanks
Satya
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