Computer Science: Data Transmission question and answers graded A+ 2025/2026

Computer Science: Data Transmission

data transmission - ANS-The movement of data from one place to another place

The two ways of data transmission - ANS-Analog Data Transmission
Digital Data Transmission

data communication - ANS-the transmission and reception of data through a transmission
media or medium

Communications Model - ANS-Sender
Receiver
Transmission media or medium

sender - ANS-the person or device which produces the data to be transmitted.
Also known as source

Destination - ANS-The person or device which receives data transmitted by sender

Communications Media - ANS-Physical or Non-Physical path available for the transmission of
data which can be either wired or wireless media

Wired/Guided/Non-Radiation Media - ANS-Twisted Pair Cable
Coaxial Cable
Fibre Optic Cable

Wireless/Unguided/Radiated Media - ANS-Micro Waves
Radio Waves
Infrared Waves
Bluetooth

What reduces the strength of analog signals? - ANS-Impairments/Disturbances from nature

Disturbances on Analog Signals - ANS-EMI (Electro Magnetic Interference)
Temperature
White Noise
Cross Talk

What is used to strengthen the weakened analog signal? - ANS-Repeaters or Boosters

Digital Signals - ANS-Signals transmitted between digital devices

, devices that use digital signals - ANS-Computers
Smart phones
Electronic Devices

When transmitting data, what are the factors to be considered? - ANS-The direction of data
transmission (mode)
The method of data transmission
The method of synchronization of data

transmission modes for data - ANS-Simplex Data Transmission
Half Duplex Data Transmission
Full Duplex Data Transmission

Simplex Data Transmission - ANS-Data is sent in one direction only

examples for Simplex Data Transmission - ANS-Television
Radio
Computer to Printer

Half Duplex Data Transmission - ANS-Data is sent in both directions, but not at the same time

examples for Half Duplex Data Transmission - ANS-Walkie Talkie
Email
Postal Mail

Full Duplex Data Transmission - ANS-Data is sent in both directions simultaneously

examples for Full Duplex Data Transmission - ANS-Telephone Transmission
Instant Messaging
Video Conference
Broadband Connections

Methods of Data Transmission: - ANS-Serial Data Transmission
Parallel Data Transmission

Serial Data Transmission - ANS-one bit sent at a time over a single wire

types of Serial Data Transmission - ANS-Simplex Serial
Half Duplex Serial
Duplex Serial

Simplex Serial Data Transmission - ANS-Data will be transmitted one bit at a time using a single
wire in one direction only