Which of the following security options must be explicitly configured (i.e. which options are not enabled by default)?

Which of the following security options must be explicitly configured (i.e. which options are not enabled by default)?
A . Data encryption between Splunk Web and splunkd.
B . Certificate authentication between forwarders and indexers.
C . Certificate authentication between Splunk Web and search head.
D . Data encryption for distributed search between search heads and indexers.

Answer: B