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PubNub publishes and subscribes _________ in order to send and receive messages.

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PubNub publishes and subscribes _________ in order to send and receive messages.

(a) Network

(b) Account

(c) Portal

(d) Keys

I got this question in examination.

This interesting question is from Sending and Receiving Data in Real Time Through Internet topic in portion Working with the Cloud of IOT

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The correct option is (d) Keys

To explain I would say: It is necessary to generate our PubNub publishes and subscribes keys in order to send and receive messages in the network.

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