Data Communication Quiz

Which of the following is false with respect to digital data transmission?

• LAN is a digital data transmission

• Can transmit binary data

• Only restricted to communication between computers

• Can transmit analog data

Why is digital data not easily affected by noise?

• High power transmission

• Cannot easily change binary 1 to 0

• High frequency transmission

• Low frequency transmission

What is the process of digital communication where a threshold value is set at the receiver to reduce noise?

• Signal threshold

• Data regeneration

• Signal regeneration

• Signal cut off

What is the number of error bits that occur for a given number of bits transmitted called?

• Bit error

• Error rate

• Bit error rate

• Error bit rate

Data is transmitted in 512 bytes. What is the average number of errors expected if the system BER is 2:10,000?

• 1

• 0

• 0.542

• 0.819

Why can Digital data use time division multiplexing?

• Less power

• High power

• Discrete data

• Continuous data

Speed of transmission is increased by channel encoding.

• True

• False

Which of the following bit has an error if odd parity is used?

• A

• B

• C

• D

The sharing of a medium and its link by two or more devices is called _________

• Fully duplexing

• Multiplexing

• Micropleixng

• Duplexing

Multiplexing is used in _______

• Packet switching

• Circuit switching

• Data switching

• Packet & Circuit switching