1. In what century did electronic communication begin? 2. Name the three main elements of a communication system and dra

[answerhappygod]

1. In what century did electronic communication begin?
2. Name the three main elements of a communication system and
draw a diagram that shows their relationship.
3. List five types of communication media used for
communication, and state which three are the most commonly
used.
4. Name two common household remote-control units and state the
type of media and frequency ranges used for each.
5. What is the name given to simultaneous two-way communication?
Give three examples.