6. Which component represents the actual information or data to be communicated?
a) Sender
b) Receiver
c) Transmission medium
d) Message

7. Without a protocol, what could happen between two communicating devices?
a) The message could be lost.
b) The devices could fail to connect physically.
c) The devices could be connected but not communicating effectively.
d) The transmission medium could be damaged.

8. In which mode of communication can only one device transmit while the other can  only receive?
a) Simplex
b) Half-Duplex
c) Full-Duplex
d) Multiplex

9. Which devices is the best to represent simplex mode?
a) Walkie-talkies
b) CB radios
c) Keyboards and traditional monitors
d) Telephones

10. What is characteristic of full-duplex mode?
a) Only one device can transmit at a time.
b) Both stations can transmit and receive simultaneously.
c) Each station can only transmit or receive, not both.
d) Communication is unidirectional.