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Answer -
There is no fixed direction or path for the flow of information under informal communication. The information moves in a very vague, confusing and zigzag manner. That is why the network of informal communication is known as Grape Vine. following are the types of grapevine communication network.
i. Single Strand Network: In a single strand pattern each individual communicates to the other in sequence.
ii. Gossip Network: In gossip network, one person shares the information with many other people.
iii. Probability Network: In probability network the individual communicates randomly with other individuals.
iv. Cluster Network: In this network, information is first shared between two people who trust each other. One of them then passes the information to some other person who in turn shares it with another and so the information spreads.