Data and Digital Communications

Welcome to  Data and Digital Communications. The quiz will randomly run 20 questions from Data and Digital Communications which you have to answer in 10 minutes.

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A medium access control technique for multiple access transmission media is ______

In OSI reference model, which of the following layer provides error-free delivery of data?

The signal to noise ratio for a voice grade line 30.1 dB (decibles) or a power ratio of 1023:1. The maximum achievable data rate on this line whose spectrum ranges from 300 Hz to 4300 Hz is ________

In OSI model, which of the following layer transforms information from machine format into that understandable by user?

The number of oscillations per second of a wave is called its ______

Which of the following condition is used to transmit two packets over a medium at the same time?

The simultaneous transmission of data to a number of stations is known as ____________

Protocols in which the sender sends one frame and then waits for an acknowledgement before proceeding are called __________

The frames which are intimated for receiving are called ________

A distributed network configuration in which all data/information pass through a central computer is _______ network

Polynomial code is also known as __________

Which of the following layer protocols are responsible for user and the application programme support such as passwords, resource sharing etc?

Point-to-point transmission with one sender and one receiver is sometimes called ________

The probability that a single bit will be in error on a typical public telephone line using 4800 bps modem is 10 to the power -3. If no error detection mechanism is used, the residual error rate for a communication line using 9- bit frames is approximately equal to __________

The number of bit positions in which the code words differ is called _______

ISDN is an example of _______ network

A network that requires human intervention of route signals is called a ______

What is the maximum data capacity of STP?

A modem that is attached to the telephone system by jamming the phone,s handset into two flexible receptacles in the coupler

Protocols in which the sender waits for a positive acknowledgement before advancing to the next data item are often called ___________


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