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Which layer of the OSI model focuses on error-free transfer of data frames and controls frame synchronization?
- a)Physical Layer
- b)Data Link Layer
- c)Network Layer
- d)Transport Layer
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which layer of the OSI model focuses on error-free transfer of data fr...
The layer that focuses on error-free transfer of data frames and controls frame synchronization is the Data Link Layer. It is responsible for packaging bits into data frames, checking for physical transmission errors, and ensuring error-free transmission over the link. This layer is divided into two sub-layers: the Media Access Control (MAC) layer and the Logical Link Control (LLC) layer.
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Which layer of the OSI model focuses on error-free transfer of data fr...
Data Link Layer
The Data Link Layer is the second layer of the OSI (Open Systems Interconnection) model. It is responsible for the error-free transfer of data frames between nodes over a physical network. It provides a reliable and efficient method of transmitting data by controlling frame synchronization and ensuring error-free delivery.
Functions of the Data Link Layer:
1. Frame Synchronization: The Data Link Layer is responsible for dividing the data received from the Network Layer into frames. It adds a header and a trailer to each frame, allowing the receiving node to detect the start and end of each frame. This ensures proper synchronization between the sender and receiver.
2. Error Detection and Correction: The Data Link Layer checks for errors in the received frames using techniques such as checksums or cyclic redundancy checks (CRC). If an error is detected, the frame is discarded, and the sender is notified to retransmit the frame.
3. Flow Control: The Data Link Layer regulates the flow of data between the sender and receiver. It prevents the receiver from being overwhelmed with data by using techniques such as buffering, acknowledgments, and windowing. This ensures efficient and reliable data transfer.
4. Access Control: The Data Link Layer manages access to the physical network medium when multiple devices are connected. It resolves conflicts and prevents simultaneous transmission by implementing protocols such as Carrier Sense Multiple Access with Collision Detection (CSMA/CD) or Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA).
5. Addressing: The Data Link Layer assigns physical addresses, such as MAC (Media Access Control) addresses, to each device connected to the network. These addresses are used to identify the source and destination of data frames.
Conclusion:
In summary, the Data Link Layer of the OSI model is responsible for ensuring error-free transfer of data frames and controlling frame synchronization. It performs functions such as frame synchronization, error detection and correction, flow control, access control, and addressing. By providing reliable and efficient data transfer, the Data Link Layer plays a crucial role in the overall network communication process.
The Data Link Layer is the second layer of the OSI (Open Systems Interconnection) model. It is responsible for the error-free transfer of data frames between nodes over a physical network. It provides a reliable and efficient method of transmitting data by controlling frame synchronization and ensuring error-free delivery.
Functions of the Data Link Layer:
1. Frame Synchronization: The Data Link Layer is responsible for dividing the data received from the Network Layer into frames. It adds a header and a trailer to each frame, allowing the receiving node to detect the start and end of each frame. This ensures proper synchronization between the sender and receiver.
2. Error Detection and Correction: The Data Link Layer checks for errors in the received frames using techniques such as checksums or cyclic redundancy checks (CRC). If an error is detected, the frame is discarded, and the sender is notified to retransmit the frame.
3. Flow Control: The Data Link Layer regulates the flow of data between the sender and receiver. It prevents the receiver from being overwhelmed with data by using techniques such as buffering, acknowledgments, and windowing. This ensures efficient and reliable data transfer.
4. Access Control: The Data Link Layer manages access to the physical network medium when multiple devices are connected. It resolves conflicts and prevents simultaneous transmission by implementing protocols such as Carrier Sense Multiple Access with Collision Detection (CSMA/CD) or Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA).
5. Addressing: The Data Link Layer assigns physical addresses, such as MAC (Media Access Control) addresses, to each device connected to the network. These addresses are used to identify the source and destination of data frames.
Conclusion:
In summary, the Data Link Layer of the OSI model is responsible for ensuring error-free transfer of data frames and controlling frame synchronization. It performs functions such as frame synchronization, error detection and correction, flow control, access control, and addressing. By providing reliable and efficient data transfer, the Data Link Layer plays a crucial role in the overall network communication process.
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Which layer of the OSI model focuses on error-free transfer of data frames and controls frame synchronization?a)Physical Layerb)Data Link Layerc)Network Layerd)Transport LayerCorrect answer is option 'B'. Can you explain this answer?
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