The document discusses the key components of communication including sender, receiver, message encoding, decoding, channels, feedback, filters, barriers, and context. It provides examples for each component and explains how effective communication follows a circular process involving encoding by the sender, transmitting a message through a channel, decoding by the receiver, and feedback from the receiver to the sender. Breakdowns can occur at each stage due to filters, barriers, psychological or physiological noise, or differences in communication environment and context between the sender and receiver.