Flow Control Quiz & Flashcards in Data Link Layer

Study Notes

Flow Control in Data Link Layer

Flow control is a mechanism used in the data link layer to prevent the sender from overwhelming the receiver with data. It ensures that the receiver can process the data at its own pace.

Types of Flow Control:

Stop-and-Wait Flow Control:
- Sender sends a frame and waits for acknowledgment from the receiver.
- Receiver sends an acknowledgment after processing the frame.
- Sender waits for the acknowledgment before sending the next frame.
Sliding Window Flow Control:
- Sender sends a window of frames and waits for acknowledgment from the receiver.
- Receiver sends an acknowledgment for the received frames.
- Sender slides the window and sends the next set of frames after receiving the acknowledgment.

Flow Control Mechanisms:

Buffering: The receiver buffers incoming frames to prevent data loss.
Windowing: The receiver sets a window size to limit the number of frames sent by the sender.
Packet spacing: The sender spaces out packets to prevent network congestion.

Flow Control Protocols:

Stop-and-Wait ARQ (Automatic Repeat Request): A simple protocol that uses stop-and-wait flow control and error detection.
Go-Back-N ARQ: A protocol that uses sliding window flow control and error detection.
Selective Repeat ARQ: A protocol that uses sliding window flow control and error detection, with the ability to retransmit specific frames.

Key Concepts:

Window size: The maximum number of frames that can be sent before an acknowledgment is required.
Sequence number: A unique number assigned to each frame to ensure correct ordering.
Acknowledgment: A response from the receiver indicating successful reception of frames.

Flow Control in Data Link Layer

Flow control prevents the sender from overwhelming the receiver with data, ensuring the receiver can process data at its own pace.

Types of Flow Control

Stop-and-Wait Flow Control: sender sends a frame, waits for acknowledgment, and then sends the next frame after receiving acknowledgment.
Sliding Window Flow Control: sender sends a window of frames, waits for acknowledgment, and then slides the window to send the next set of frames.

Flow Control Mechanisms

Buffering: receiver buffers incoming frames to prevent data loss.
Windowing: receiver sets a window size to limit the number of frames sent by the sender.
Packet spacing: sender spaces out packets to prevent network congestion.

Flow Control Protocols

Stop-and-Wait ARQ: a simple protocol using stop-and-wait flow control and error detection.
Go-Back-N ARQ: a protocol using sliding window flow control and error detection.
Selective Repeat ARQ: a protocol using sliding window flow control and error detection, with the ability to retransmit specific frames.

Key Concepts

Window size: the maximum number of frames that can be sent before an acknowledgment is required.
Sequence number: a unique number assigned to each frame to ensure correct ordering.
Acknowledgment: a response from the receiver indicating successful reception of frames.