Computer Communication Chapter 6
50 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the purpose of an error correction code?

  • To map k-bit input onto an n-bit codeword (correct)
  • To reduce the number of stations on a medium
  • To reduce the possibility of error detection
  • To increase the effective data rate

What type of configuration topology involves only two stations?

  • Half duplex
  • Full duplex
  • Multipoint
  • Point-to-point (correct)

What is the main difference between half duplex and full duplex?

  • Error detection method
  • Type of transmission
  • Number of stations
  • Number of data paths (correct)

What is the purpose of a full duplex configuration?

<p>To allow simultaneous transmission and reception (A)</p> Signup and view all the answers

What type of transmission is characterized by alternate transmission and reception?

<p>Half duplex (B)</p> Signup and view all the answers

What is the benefit of using a line configuration?

<p>Efficient use of resources (C)</p> Signup and view all the answers

What is the term for the physical arrangement of stations on a medium?

<p>Line configuration topology (A)</p> Signup and view all the answers

What is the term for a traditional mainframe computer and terminals setup?

<p>Multipoint topology (C)</p> Signup and view all the answers

What is the purpose of error detection and correction?

<p>To detect and correct errors in transmission (C)</p> Signup and view all the answers

What is the term for the classification of data exchange?

<p>Duplex (C)</p> Signup and view all the answers

What is a key characteristic of asynchronous transmission?

<p>Adds 2-3 bits of overhead per character (A)</p> Signup and view all the answers

What type of error occurs when a contiguous sequence of bits is altered?

<p>Burst error (D)</p> Signup and view all the answers

What is the purpose of a preamble and postamble in synchronous transmission?

<p>To indicate the start and end of a block of data (C)</p> Signup and view all the answers

What is the primary disadvantage of asynchronous transmission?

<p>Higher overhead compared to synchronous transmission (B)</p> Signup and view all the answers

What is the purpose of error detection codes?

<p>To detect errors in transmission (A)</p> Signup and view all the answers

What is a key advantage of synchronous transmission?

<p>Lower overhead compared to asynchronous transmission (B)</p> Signup and view all the answers

What is the purpose of the frame check sequence (FCS) in cyclic redundancy check (CRC) error detection?

<p>To generate a checksum for error detection (C)</p> Signup and view all the answers

What is a limitation of error correction in wireless applications?

<p>High bit error rate causing retransmissions (A)</p> Signup and view all the answers

What is the primary advantage of error correction over error detection?

<p>Ability to correct errors without retransmission (A)</p> Signup and view all the answers

What is the purpose of parity bits in asynchronous transmission?

<p>To detect errors in transmission (D)</p> Signup and view all the answers

What is a key advantage of differential encoding?

<p>It is more reliable in detecting transitions than levels (B)</p> Signup and view all the answers

What is a characteristic of Manchester encoding?

<p>A transition in the middle of each bit period (C)</p> Signup and view all the answers

What is a limitation of multilevel binary encoding?

<p>It can lose synchronization with long runs of zeros or ones (C)</p> Signup and view all the answers

What is a key benefit of bipolar-AMI encoding?

<p>It has no loss of synchronization with long strings of ones (A)</p> Signup and view all the answers

What is a key difference between bipolar-AMI and pseudoternary encoding?

<p>Pseudoternary uses no line signal for zero while bipolar-AMI uses a pulse (A)</p> Signup and view all the answers

What is a key characteristic of scrambling in data transmission?

<p>It is used to prevent long runs of zeros or ones (C)</p> Signup and view all the answers

What is a key benefit of multilevel binary encoding?

<p>It can represent more than one bit of data per signal element (D)</p> Signup and view all the answers

What is a key limitation of non-return-to-zero encoding?

<p>It can lose synchronization with long runs of zeros or ones (A)</p> Signup and view all the answers

What is a key difference between Manchester and differential encoding?

<p>Differential encoding uses transitions while Manchester encoding uses levels (D)</p> Signup and view all the answers

What is a key benefit of using bipolar-AMI encoding?

<p>It has lower bandwidth and easy error detection (C)</p> Signup and view all the answers

What is the primary characteristic of a digital signal?

<p>Discrete, discontinuous voltage pulses (C)</p> Signup and view all the answers

What is the term used to describe the rate of data transmission in bits per second?

<p>Data rate (C)</p> Signup and view all the answers

What is the primary factor that affects signal interpretation in digital signaling?

<p>Signal to noise ratio (C)</p> Signup and view all the answers

What is the term used to describe the rate at which the signal level changes, measured in baud?

<p>Modulation rate (A)</p> Signup and view all the answers

What is the primary characteristic of unipolar encoding?

<p>All signal elements have the same sign (A)</p> Signup and view all the answers

What is the primary purpose of clocking in digital signaling?

<p>To determine the timing of bits (D)</p> Signup and view all the answers

What is the term used to describe the duration of a bit in digital signaling?

<p>Time taken for the transmitter to emit the bit (D)</p> Signup and view all the answers

What is the primary characteristic of Nonreturn to Zero-Level (NRZ-L) encoding?

<p>Voltage remains constant during bit interval (B)</p> Signup and view all the answers

What is the term used to describe binary 1 and binary 0 respectively?

<p>Mark and space (A)</p> Signup and view all the answers

What is the primary factor that determines the modulation rate in digital signaling?

<p>Type of digital encoding used (A)</p> Signup and view all the answers

What is the primary purpose of scrambling in digital transmission?

<p>To replace sequences that would produce constant voltage (B)</p> Signup and view all the answers

What is unique about Differential Manchester Encoding?

<p>It uses a midbit transition to clock only the start of the bit period (D)</p> Signup and view all the answers

What is the main advantage of B8ZS encoding?

<p>It reduces the DC component (C)</p> Signup and view all the answers

What is the primary characteristic of Amplitude Shift Keying (ASK)?

<p>It represents 0 and 1 by different amplitudes (D)</p> Signup and view all the answers

What is the main disadvantage of Amplitude Shift Keying (ASK)?

<p>It is inefficient and prone to sudden gain changes (D)</p> Signup and view all the answers

What is the primary characteristic of Binary Frequency Shift Keying (BFSK)?

<p>It represents 0 and 1 by different frequencies (D)</p> Signup and view all the answers

What is an advantage of using Multiple FSK?

<p>It is more bandwidth efficient (B)</p> Signup and view all the answers

What is the primary characteristic of Phase Shift Keying (PSK)?

<p>It represents 0 and 1 by different phases (A)</p> Signup and view all the answers

What is the primary advantage of Differential PSK?

<p>It shifts the phase relative to the previous transmission (D)</p> Signup and view all the answers

What is the primary application of Modulation Techniques in telecommunications?

<p>Public telephone systems and high-speed data transmission (C)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser