WorksheetsDCN CHAPTER 2 (PART 2)
Total questions: 15
Worksheet time: 8mins
What is a communication channel?
A type of computer that processes data
A method to encode signals
A pathway through which information is conveyed
A type of network cable
What does channel capacity represent?
Number of devices connected to a network
Distance data can travel
Maximum bit rate a channel can handle
Signal power in a receiver
What does Shannon’s Law calculate?
Power usage in transmission
Maximum data rate of a noisy channel
Type of signal encoding
Total number of network users
According to Shannon's Law, increasing which factor improves channel capacity?
Packet size
Bandwidth
Transmission delay
Number of devices
What type of data has infinite values within a range?
Analog
Binary
Digital
Encoded
What is line coding?
Converting analog to digital signals
Converting binary data to digital signals
Encoding voice signals
Replacing modulated signals
Which line coding method uses only one voltage level?
Bipolar
Unipolar
Manchester
Differential
In NRZ-Invert (NRZ-I) encoding, what does a voltage inversion represent?
Bit 0
Bit 1
Start bit
Stop bit
What is the advantage of using Manchester encoding?
Less power usage
Uses only one wire
No signal transitions
Built-in synchronization
What voltage level represents binary 0 in AMI encoding?
Positive
Negative
Zero
Alternating
Which bipolar encoding method substitutes eight 0s with a violation pattern?
HDB3
B8ZS
NRZ
RZ
In which modulation technique is the amplitude changed to represent bits?
ASK
FSK
PSK
QAM
What does the baud rate measure?
Frequency of modulation
Signal changes per second
Number of bits per frame
Size of packets
Which device connects DTE to a transmission medium?
Printer
RAM
Router
DCE
What does a modem do?
Converts digital data to analog and vice versa
Sends data via satellite
Stores digital data
Synchronizes network clocks
