CCA-410 · Question #94
Which two features does Kerberos security add to a Hadoop cluster?
The correct answer is A. Authentication for user access to the cluster against a central server D. User authentication on all remote procedure calls (RPcs). Hadoop can use the Kerberos protocol to ensure that when someone makes a request, they really are who they say they are. This mechanism is used throughout the cluster. In a secure Hadoop configuration, all of the Hadoop daemons use Kerberos to perform mutual authentication…
Question
Which two features does Kerberos security add to a Hadoop cluster?
Options
- AAuthentication for user access to the cluster against a central server
- BEncryption for data on disk ("at rest")
- CEncryption on all remote procedure calls (RPCs)
- DUser authentication on all remote procedure calls (RPcs)
- ERoot access to the cluster for users hdfs and mapred but non-root acess clients
How the community answered
(45 responses)- A71% (32)
- B7% (3)
- C18% (8)
- E4% (2)
Explanation
Hadoop can use the Kerberos protocol to ensure that when someone makes a request, they really are who they say they are. This mechanism is used throughout the cluster. In a secure Hadoop configuration, all of the Hadoop daemons use Kerberos to perform mutual authentication, which means that when two daemons talk to each other, they each make sure that the other daemon is who it says it is. Additionally, this allows the NameNode and JobTracker to ensure that any HDFS or MR requests are being executed with the appropriate authorization level.
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