Flow Control and Error Control in Transport Layer: Interactive Learning Quizzes

Question 1

In the transport layer, how does a sliding window ensure reliable data transmission?

Accepted Answer

It ensures that the sender only transmits data segments that the receiver is ready to receive.

Answer

It prevents the receiver from accepting duplicate data segments.

Answer

It allows the receiver to send acknowledgments for received data segments out of order.

Question 2

What is the primary function of the cumulative acknowledgment in TCP?

Accepted Answer

To acknowledge all received segments up to a certain point

Answer

To request retransmission of lost segments

Answer

To indicate the maximum window size

Question 3

Which mechanism primarily manages flow control in TCP?

Accepted Answer

Sliding windows

Answer

Congestion avoidance

Answer

Error correction

Answer

Header compression

Question 4

In TCP, what is the primary purpose of sequence numbers?

Accepted Answer

To identify a specific segment within a data stream

Answer

To guarantee reliable message delivery

Answer

To prevent data loss during retransmissions

Answer

To facilitate efficient error correction

Question 5

What is the primary function of the sliding window in TCP?

Accepted Answer

It determines the number of segments that can be sent and acknowledged before retransmission is necessary.

Answer

It limits retransmissions to specific segments of the data stream in case of errors.

Answer

It prevents the receiver from buffer overflow by regulating the number of segments it can accept at once.

Answer

It maintains the order of segment transmission and reception, even when some segments are lost.

Question 6

What is the role of acknowledgements (ACKs) in TCP?

Accepted Answer

To notify the sender that data has been successfully received.

Answer

To initiate retransmissions if an ACK is not received within a specified time frame.

Answer

To regulate data flow by indicating the receiver's available buffer space.

Answer

To establish and maintain the connection between the sender and receiver.

Question 7

What is the primary purpose of a checksum in data communication?

Accepted Answer

To detect errors that occur during data transmission.

Answer

To prevent data loss resulting from retransmissions.

Answer

To preserve the order of data segments.

Answer

To enhance the speed of data transfer.

Question 8

What is the primary goal of error control in data communication?

Accepted Answer

To ensure accurate and reliable data transmission.

Answer

To prevent data loss and corruption.

Answer

To improve the speed of data transfer.

Answer

To maintain the order of data segments.

Question 9

What is the primary purpose of sequence numbers in a transport layer protocol?

Accepted Answer

To assure the packets are received in the correct order

Answer

To prevent duplicate packets from being accepted by the receiver

Answer

To identify the destination port

Answer

To calculate the checksum for error detection

Question 10

What is the primary responsibility of the transport layer in data communications?

Accepted Answer

To provide reliable and efficient data transfer between hosts

Answer

To regulate network congestion

Answer

To establish and manage network connections

Answer

To route packets based on their destination

Question 11

Which of the following is a primary function of flow control in the transport layer?

Accepted Answer

Prevent the sender from overwhelming the receiver with data

Answer

Ensure that data segments are delivered in order

Answer

Detect and correct errors in data transmission

Answer

Provide a secure connection between the sender and receiver

Question 12

What is the primary purpose of using sequence numbers in the transport layer?

Accepted Answer

To ensure that data segments are delivered and assembled in the correct order at the receiver

Answer

To detect and correct errors in data transmission

Answer

To identify the source and destination of data segments

Answer

To control the flow of data between the sender and receiver

Question 13

What is the key difference between flow control and error control in the transport layer?

Accepted Answer

Flow control manages the rate of data transmission, while error control ensures the integrity and accuracy of data

Answer

Flow control is only used for unicast communication, while error control is used for both unicast and multicast communication

Answer

Flow control is implemented at the sender, while error control is implemented at the receiver

Question 14

What is the purpose of using a parity bit in error control?

Accepted Answer

To detect odd or even number of bit errors in a data unit

Answer

To identify the source of data

Answer

To correct errors in data transmission

Answer

To order data segments correctly at the receiver

Question 15

What is the main difference between a stop-and-wait flow control and a sliding window flow control?

Accepted Answer

Stop-and-wait sends one segment at a time and waits for an ACK before sending the next, while sliding window sends multiple segments before waiting for ACKs

Answer

Stop-and-wait is more efficient than sliding window

Answer

Sliding window is used for reliable data transfer, while stop-and-wait is used for unreliable data transfer

Question 16

What is the primary purpose of using a checksum in the transport layer?

Accepted Answer

To detect errors in data transmission

Answer

To identify the source of data

Answer

To order data segments correctly at the receiver

Answer

To control the flow of data

Question 17

Which transport layer protocol uses a three-way handshake for connection establishment?

Accepted Answer

TCP

Answer

UDP

Answer

HTTP

Answer

ICMP

Question 18

Which flow control mechanism is designed to allow the receiver to regulate the rate at which data is received from the sender?

Accepted Answer

Sliding Window Protocol

Answer

Stop-and-Wait Protocol

Answer

Error Detection Code

Answer

Congestion Window

Question 19

What is the primary purpose of using sequence numbers in flow control?

Accepted Answer

To maintain the correct order and sequencing of data packets during transmission

Answer

To detect and correct errors in data transmission

Answer

To provide a unique identifier for each packet

Question 20

What is the main role of acknowledgments (ACKs) in error control?

Accepted Answer

To inform the sender that data was received successfully and without errors

Answer

To prevent the sender from transmitting more data until an ACK is received

Answer

To detect errors in the transmitted data

Question 21

What is a key advantage of using selective repeat in a sliding window protocol?

Accepted Answer

It enables efficient recovery of only the missing or corrupted packets, reducing retransmission overhead

Answer

It simplifies the acknowledgment process

Answer

It always guarantees in-order delivery of packets

Question 22

How does UDP differ from TCP in terms of error control?

Accepted Answer

UDP does not provide inherent error control mechanisms, while TCP offers robust error detection and correction features

Answer

UDP has more advanced error control mechanisms than TCP

Answer

TCP is suitable for real-time applications, while UDP is better for applications requiring reliable data delivery

Question 23

Which transport layer protocol is known for providing reliable, connection-oriented service?

Accepted Answer

Transmission Control Protocol (TCP)

Answer

User Datagram Protocol (UDP)

Answer

Reliable Data Protocol (RDP)

Answer

Stream Control Transmission Protocol (SCTP)

Question 24

What is the primary purpose of a checksum in error control?

Accepted Answer

To detect errors in transmitted data by calculating and comparing the sum of data bits

Answer

To correct errors in transmitted data

Answer

To prevent errors from occurring