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