Congestion Control Mechanisms: Master Flow Control and Network Optimization

Question 1

What is the primary purpose of employing a sliding window in flow control?

Accepted Answer

Allowing multiple frame transmissions before an acknowledgment is received

Answer

Preventing buffer overflow on the receiving end

Answer

Detecting and discarding duplicate frames

Answer

Ensuring data transmission occurs in the correct sequence

Question 2

Which of the following is NOT an advantage associated with congestion control mechanisms?

Accepted Answer

Higher packet loss rates

Answer

Enhanced network performance

Answer

Reduced latency

Answer

Increased bandwidth utilization

Question 3

Identify the primary objective of congestion avoidance.

Accepted Answer

Detection and prevention of congestion

Answer

Recovery from congestion

Answer

Data flow control

Answer

Frame windowing

Question 4

Which of the following is NOT a Congestion Control Mechanism (CCM)?

Accepted Answer

Error detection

Answer

Flow control

Answer

Windowing

Answer

Rate adaptation

Question 5

What is the primary objective of congestion control in data communications?

Accepted Answer

To prevent network congestion and maintain optimal data transmission

Answer

To detect and correct data transmission errors

Answer

To ensure that all packets are received in order

Answer

To establish and maintain network connections

Question 6

Congestion control mechanisms are typically implemented at which layer(s) of the TCP/IP model?

Accepted Answer

Both Transport and Network layers

Answer

Transport layer (TCP)

Answer

Network layer (IP)

Answer

Application layer

Question 7

In congestion control, what is the primary purpose of flow control?

Accepted Answer

To adjust the data transmission rate dynamically and prevent network congestion.

Answer

To break large data packets into smaller units for easier transmission.

Answer

To give priority to the transmission of specific data types over others.

Answer

To offer a mechanism for receivers to request the retransmission of lost packets.

Question 8

In data communications, what does windowing refer to?

Accepted Answer

A technique used to control the number of packets a sender can transmit before receiving an acknowledgment.

Answer

A visual representation of network traffic patterns at a specific time.

Answer

A mechanism for identifying and discarding corrupt data packets.

Answer

A protocol for establishing connections between network devices.

Question 9

Which of the following is an advantage of using rate adaptation for congestion control?

Accepted Answer

Allows the sender to dynamically adjust the transmission rate based on network conditions.

Answer

Simplifies the implementation of congestion control mechanisms.

Answer

Eliminates the need for windowing and flow control techniques.

Answer

Ensures guaranteed delivery of data packets.

Question 10

In congestion control, what is a sliding window?

Accepted Answer

A mechanism for managing the number of outstanding packets a sender can transmit.

Answer

A technique for prioritizing the transmission of specific data types.

Answer

A tool for visualizing network traffic flow.

Answer

A protocol for establishing connections between network devices.

Question 11

Which advantage do hierarchical congestion control schemes offer?

Accepted Answer

Improved congestion management in networks with intricate topologies.

Answer

Simplified configuration and maintenance of congestion control mechanisms.

Answer

Zero packet loss guarantee in congested networks.

Answer

Elimination of the need for explicit feedback from receivers.

Question 12

Which of the following is NOT a type of feedback used in congestion control mechanisms?

Accepted Answer

User feedback

Answer

Explicit feedback

Answer

Implicit feedback

Answer

Network management feedback

Question 13

How do congestion control mechanisms contribute to improved network performance?

Accepted Answer

Increased throughput and reduced latency

Answer

Enhanced bandwidth availability

Answer

Improved data security

Question 14

Which congestion control mechanism modifies the sending rate based on feedback from the receiving end?

Accepted Answer

Rate adaptation

Answer

Flow control

Answer

Choke packets

Answer

Windowing

Question 15

What is the primary objective of employing sliding windows in congestion control?

Accepted Answer

To regulate data flow and obviate buffer overflow

Answer

To diminish latency

Answer

To ameliorate data encryption

Question 16

Which of the following mechanisms is NOT employed for flow control?

Accepted Answer

Congestion avoidance

Answer

Leaky bucket

Answer

Stop-and-wait

Answer

Sliding window

Question 17

What is the principal advantage of utilizing a leaky bucket algorithm for flow control?

Accepted Answer

It can smoothen traffic flow and mitigate bursts

Answer

It guarantees bandwidth allocation

Answer

It eradicates network congestion

Answer

It diminishes packet loss

Question 18

Which congestion control mechanism merges flow control and windowing to optimize data transmission?

Accepted Answer

TCP

Answer

ICMP

Answer

UDP

Answer

IGMP

Question 19

What is the fundamental purpose of implementing a congestion window in TCP?

Accepted Answer

To circumscribe the volume of data that can be transmitted without acknowledgment

Answer

To augment network bandwidth

Answer

To obviate deadlocks

Question 20

What is the function of slow start in TCP congestion control?

Accepted Answer

To incrementally expand the congestion window size to avoid overloading the network

Answer

To decrement the congestion window size

Answer

To terminate data transmission

Question 21

What is the fundamental disparity between open-loop and closed-loop congestion control mechanisms?

Accepted Answer

Open-loop mechanisms rely on predictions, while closed-loop mechanisms utilize feedback

Answer

Open-loop mechanisms offer superior speed

Answer

Closed-loop mechanisms are inherently more intricate.

Question 22

Which congestion control mechanism divides the stream of data into smaller segments of equal size that are sent sequentially?

Accepted Answer

Windowing

Answer

Rate adaptation

Answer

Flow control

Answer

Congestion avoidance

Question 23

What is the primary responsibility of flow control in congestion control?

Accepted Answer

To manage the flow of data to prevent overwhelming the receiver's buffer capacity.

Answer

To automatically adjust the transmission rate

Answer

To detect and avoid congestion within a network

Question 24

What is the purpose of acknowledging received packets in congestion control?

Accepted Answer

To inform the sender that the data was successfully received, allowing for efficient flow control.

Answer

To reserve space in the receiver's buffer for incoming data

Answer

To provide a method of error correction in case of data corruption

Question 25

Which congestion control mechanism utilizes a dynamic window size that expands and contracts based on network conditions?

Accepted Answer

Sliding Window

Answer

Round-Robin

Answer

Fixed Window

Answer

Stop-and-Wait

Question 26

How does congestion avoidance differ from congestion control?

Accepted Answer

Congestion avoidance proactively takes measures to prevent congestion, while congestion control reactively responds to it.

Answer

They represent two different approaches to the same problem.

Question 27

What is the purpose of a slow-start algorithm in congestion control?

Accepted Answer

To gradually increase the transmission rate after a period of congestion to prevent overwhelming the network.

Answer

To rapidly increase the transmission rate to catch up after a period of inactivity

Answer

To keep the transmission rate constant regardless of network conditions

Question 28

Which layer of the TCP/IP model is primarily responsible for implementing congestion control mechanisms?

Accepted Answer

Transport layer

Answer

Application layer

Answer

Network layer

Answer

Data link layer

Question 29

How does effective congestion control contribute to the overall performance of a network?

Accepted Answer

It prevents data loss, reduces delays, and ensures fair and efficient utilization of network resources.

Answer

It prevents unauthorized access to network data.

Answer

It maximizes the bandwidth available to individual users.