Data Transmission and Error Checking Quiz

What is parity checking and how does it help in error detection?

• Parity checking helps in error detection by encrypting the data for secure transmission.

• Parity checking helps in error detection by adding an extra character to the data packet.

• Parity checking helps in error detection by counting the number of zeros in each character.

• Parity checking helps in error detection by adding an extra bit to each character to make the total number of ones either even or odd.

Explain the concept of even parity and odd parity in data transmission.

• Ways to compress data

• Methods used to detect errors in data transmission

• Techniques for improving data speed

• Methods for encrypting data

What is a checksum and how is it used for error detection in data transmission?

• A checksum is a type of encryption used to secure data transmission.

• A checksum is a value calculated from a data packet to detect errors during transmission. It is used by the receiver to verify the integrity of the received data.

• A checksum is a software used to compress data during transmission.

• A checksum is a physical device used to detect errors in data transmission.

Describe the process of generating and verifying a checksum in data transmission.

• Checksum is generated by subtracting all the data in a packet and then adding the result to the packet. The receiver then recalculates the checksum using the received data and compares it to the checksum sent with the packet to verify its integrity.

• Checksum is generated by multiplying all the data in a packet and then adding the result to the packet. The receiver then recalculates the checksum using the received data and compares it to the checksum sent with the packet to verify its integrity.

• Checksum is generated by summing up all the data in a packet and then adding the result to the packet. The receiver then recalculates the checksum using the received data and compares it to the checksum sent with the packet to verify its integrity.

• Checksum is generated by taking the average of all the data in a packet and then adding the result to the packet. The receiver then recalculates the checksum using the received data and compares it to the checksum sent with the packet to verify its integrity.

What is ARQ (Automatic Repeat reQuest) and how does it help in error control?

• ARQ is a type of computer virus that causes data corruption

• ARQ is a hardware component that prevents errors in data transmission

• ARQ is a software program that encrypts data to prevent errors

• ARQ is a protocol that allows the receiver to detect and request retransmission of lost or corrupted data packets. It helps in error control by ensuring that the data is accurately received.

Differentiate between parallel and duplex transmission in data communication.

• Parallel transmission allows for multiple bits of data to be sent simultaneously over separate channels, while duplex transmission enables bidirectional communication, allowing data to be transmitted and received at the same time.

• Parallel transmission and duplex transmission are the same thing

• Parallel transmission allows for data to be sent in a single direction only

• Duplex transmission allows for data to be sent in multiple directions simultaneously

How is parity check used in ARQ (Automatic Repeat reQuest) for error detection and correction?

• It is used to encrypt the data unit.

• It is used to detect errors in the received data unit.

• It is used to compress the data unit.

• It is used to increase the data transfer speed.

Explain the concept of stop-and-wait ARQ and its role in error control.

• Stop-and-wait ARQ is a protocol used for speeding up data transmission

• Stop-and-wait ARQ is a protocol used for compressing data

• Stop-and-wait ARQ is a protocol used for encrypting data

• Stop-and-wait ARQ is a protocol used for error control by ensuring that the data is successfully received before sending the next frame.

What is the difference between half-duplex and full-duplex communication?

• Communication with no data transmission

• Communication through different mediums

• Simultaneous transmission of data in both directions

• One-way communication only

Describe the advantages and disadvantages of using duplex transmission in data communication.

• Requires less bandwidth and reduces data transfer speed

• Simultaneous two-way communication with increased efficiency and reduced latency, but requires more complex hardware and can be more expensive.

• Simple hardware and cost-effective

• One-way communication with low efficiency and high latency