IT Topic 9

What are the four basic elements of communication?

• Sender, Receiver, Media, Message

• Coder, Decoder, Signal, Noise

• Data, Information, Transmission, Reception

• Input, Output, Process, Feedback

What is the function of a coder in a communication system?

• To detect errors in the message

• To transmit the message

• To encode the message for the media

• To decode the message for the receiver

Which mode of data transmission sends data one bit at a time?

• Synchronous Transmission

• Serial Transmission

• Asynchronous Transmission

• Parallel Transmission

What type of data flow direction allows data to move in both directions simultaneously?

• Half Duplex

• Full Duplex

• Simplex

• Unidirectional

Which of the following is a characteristic of digital signals?

• Continuous waveforms

• Used in low-speed telephone lines

• Two states: low and high voltage

• Represented as sine waves

What is the primary purpose of an error detector in communication?

• To enhance signal strength

• To ensure data integrity

• To transmit data faster

• To encode messages

Which type of cable is commonly used for telephone communications?

• Microwave System

• Twisted Pair Wire

• Fibre Optic Cable

• Coaxial Cable

What is the main advantage of synchronous transmission over asynchronous transmission?

• Simpler hardware

• Less error-prone

• Lower cost

• Higher efficiency

Which of the following describes a half-duplex transmission?

• Data can flow in two directions, but not simultaneously

• Data can flow in one direction only

• Data is transmitted in blocks

• Data can flow in both directions at the same time

Which type of transmission media uses light pulses for data transmission?

• Fibre Optic Cable

• Microwave System

• Twisted Pair Wire

• Coaxial Cable