Explanation

A register in which data can be shifted only in one direction is called unidirectional shift register, while if data can shifted in both directions, it is known as a bidirectional shift register.

Explanation

A combinational circuit consists of input variables, logic gates, and output variables. The logic gates accept signals from inputs and output signals are generated according to the logic circuits employed in it.

Explanation

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Explanation

Good voice reproduction via PCM can be achieved with 128 quantization levels, or 7-bit coding (27 = 128). A voice signal, conservatively, occupies a bandwidth of 4 kHz. 

Explanation

A baseband signal can be transmitted over a pair of wires (like in a telephone), coaxial cables, or optical fibers

Explanation

Coaxial cable supports both analog and digital signals. Consists of two conductors with construction that allows it to operate over a wider range of frequencies compared to twisted pair

Explanation

For point to point analog signaling, a bandwidth of up to about  1 MHz is possible.

Analog bandwidth is the maximum sinusoidal frequency of the analog signal the circuit works with. 

Explanation

Receiver: A device that accepts a signal from the transmission system and converts it into a usable form for the destination device.

Explanation

 The basic building block of any communications facility is the transmission line. Frame relay networks are commonly used for terminal-to-computer and computer-to-computer communications.

Explanation

Source is a device that generates and prepares the data for communication and receiver is also a device that receives the data transmitted by source.