SQL Server interview questions: - How will you explain publisher, distributor and subscriber in “Replication”?

This is the most expected asked SQL Server interview questions during the interview by the interviewer.

Publisher is the one who owns the database and is the main source for data. Publisher identifies what data should be distributed across.

Distributor is a bridge between publisher and subscriber. Distributor gathers all the published data and holds it until it sends it across to all subscriber. So as it is a bridge who sits in between publisher and subscriber, it supports multiple publisher and subscriber concept.

Subscriber is the end source or the final destination to which data has to be transmitted.

Figure: - Publisher, Distributor and Subscriber in action

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