Welcome to ICTJ 252 Data Communication and Computer Networking-2026.
You have 30 questions to answer (10 questions per page),
1 mark for each correct answer.
The pass mark is 10.
You have 35 minutes for this Quiz.
Please, do not cheat.
In the transmission mode, each station can transmit, but not at the same time.
In the…………transmission mode, communication is unidirectional.
A television broadcast is an example of………….transmission
A…………..is a set of rules that governs data communication.
A received signal is often not exactly the same as the original signal due to………..
In fiber optics, the signal is……….waves.
Consider a noiseless channel with a bandwidth of 4000 Hz transmitting a signal with four signal levels. Calculate the channel capacity.
When you hear a different voice during a voice call it termed as what kind of noise.
A model for communication systems consists of the following components (the list must be in the correct order):
The inner core of an optical fiber is………..in composition.
Which of the following is usually not classified as a guided medium?
Signal-to-Noise Ratio (SNR) is expressed as…………
A telephone line normally has a bandwidth of 3000 Hz (300 to 3300 Hz) assigned for data communications. The signal-to-noise ratio is usually 3162.
One of these refers to the direction of signal flow between two linked devices.
We need to send 240 kbps over a noiseless channel with a bandwidth of 20 kHz. How many signal levels do we need?
AM radio is an example of what type of wireless propagation.
Which factor makes fiber optic cable superior to twisted-pair cable?
The term that refers to the loss of strength of a signal is called.
Digital data refers to the information that is……….......
The transmission impairment that refers to a signal with high energy in a very short time is known as………..
Data flow between two devices can occur in a………way
Signals with a frequency above 30 MHz use…………….propagation.
Consider a noiseless channel with a bandwidth of 3000 Hz transmitting a signal with two signal levels.
A line-of-sight transmission impairment that can be water and oxygen is called.
The fall in signal strength with distance over any transmission medium is referred to us….
In………..transmission, the channel capacity is shared by both communicating devices at all times.
Signals with a frequency below 2 MHz use…………….propagation.
A transmission media can have signal impairment because of…..
Which factor makes twisted-pair cable widely used than fiber optic cable?
FM radio is an example of what type of wireless propagation.
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