Which component needs to encode the binary data into base 64?

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If I want to send binary data through the REST proxy, it needs to be base64 encoded .

Which component needs to encode the binary data into base 64?
A . The Producer
B . The Kafka Broker
C . Zookeeper
D . The REST Proxy

Answer: A

Explanation:

The REST Proxy requires to receive data over REST that is already base64 encoded, hence it is the responsibility of the producer