Which of the following is true about digital signals?

• Continuous wave form

• Represented by continuous electromagnetic waves

• Discrete in nature

• Represent sequence of voltage pulses

What is the term used for random disturbance or fluctuation in analog or digital signal?

• Attenuation

• Dispersion

• Noise

• Impulse

Which type of cable is made of two plastic insulated copper wires twisted together to form a single media?

• Power Lines

• Coaxial Cable

• Fiber Optics

• Twisted Pair Cable

What is the technique to mix and send multiple data streams over a single medium called?

• Channel Capacity

• Multiplexing

• Switching

• Transmission Impairment

Which of the following is a type of guided media?

• Fiber Optics

• Wireless

• Power Lines

• Coaxial Cable

What is the process for converting digital data into digital signal called?

• Transmission Impairment

• Switching

• Multiplexing

• Line Coding

Which type of modulation alters the phase to reflect the change in voltage of analog data signal?

• Phase Modulation

• Frequency Modulation

• Quadrature Phase Shift Keying

• Amplitude Modulation

What is the Layer-1 technology that uses power cables to transmit data signals?

• Fiber Optics

• Coaxial Cable

• Power Line Communication

• Twisted Pair Cable

Which type of transmission mode requires only one communication channel?

• Asynchronous Serial Transmission

• Parallel Transmission

• Serial Transmission

• Synchronous Serial Transmission

What is the technique used to convert analog wave into digital data?

• Amplitude Shift Keying

• Frequency Shift Keying

• Phase Shift Keying

• Pulse Code Modulation