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Flow Control - Fundamentals & Link Layer Video Lecture - Computer Networks
FAQs on Flow Control - Fundamentals & Link Layer Video Lecture - Computer Networks - Computer
| 1. What is flow control and why is it important in networking? |  |
Ans.Flow control is a technique used in networking to manage the rate of data transmission between two nodes to prevent overwhelming the receiver. It ensures that the sender does not send data faster than the receiver can process it, thereby preventing data loss and ensuring efficient communication. Flow control is crucial for maintaining the integrity of data transmission and optimizing network performance.
| 2. What are the common flow control mechanisms used in the link layer? | |
Ans.Common flow control mechanisms at the link layer include stop-and-wait, sliding window, and positive acknowledgment. Stop-and-wait involves the sender transmitting a single frame and waiting for an acknowledgment before sending the next one. Sliding window allows multiple frames to be sent before needing an acknowledgment, improving efficiency. Positive acknowledgment requires the receiver to confirm receipt of frames, which helps in managing the flow of data.
| 3. How does the sliding window protocol work in flow control? | |
Ans.The sliding window protocol allows the sender to transmit multiple frames before needing to wait for an acknowledgment for the first frame. It uses a 'window' that indicates the number of frames that can be sent without receiving an acknowledgment. As the sender receives acknowledgments, the window slides forward, allowing for more frames to be sent. This method enhances throughput and reduces idle time in communication.
| 4. What is the difference between flow control and error control in networking? | |
Ans.Flow control manages the rate of data transmission to prevent the receiver from being overwhelmed, while error control focuses on detecting and correcting errors that may occur during data transmission. Flow control ensures smooth communication, whereas error control mechanisms, such as checksums and acknowledgments, ensure data integrity by identifying and retransmitting erroneous frames.
| 5. How do buffer sizes affect flow control in data transmission? | |
Ans.Buffer sizes play a crucial role in flow control as they determine how much data can be temporarily stored while waiting to be processed. If the sender transmits data faster than the receiver can process it, the buffer may overflow, leading to data loss. Adequate buffer sizing helps maintain efficient communication by allowing the receiver enough time to process incoming data without overwhelming its capacity.
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Mar 15, 2026 Last updated
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