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