Which model of communication was originally described as a one-way process consisting of the following five questions: who, says what, in what channel, to whom, and with what effect?

Lasswell's 5 step model

Explanation:

This model of communication defines the answers to the questions who says, to whom, says what, the effects it was said with and in what channel.

Lasswell's 5 step model of communication was described as a single way process and was used for the analysis of mass communication, communication in groups and between people to disperse messages into these. It was designed for the purpose of studying and analyzing the business strategies and the media hype of different countries at that time.