Question
Which layer of the OSI Model is responsible for ensuring
error-free delivery of data between source and destination?Solution
Detailed Explanation: The Transport Layer in the OSI model ensures reliable data transfer between the source and destination. It provides services such as segmentation, flow control, error detection, and retransmission of lost packets. Protocols like TCP (Transmission Control Protocol) operate at this layer to guarantee that data packets are delivered error-free, in the correct sequence, and without duplication. It breaks down large data into smaller segments, assigns sequence numbers, and ensures acknowledgment of received segments. If an error occurs, this layer is responsible for re-sending the affected packets, maintaining the integrity of the communication. Why Other Options Are Incorrect:
- Application Layer: This layer interacts with end-users and facilitates application services like file transfers (FTP) and web browsing (HTTP). It does not handle error correction.
- Network Layer: This layer determines the best physical path for data and manages logical addressing using protocols like IP. It doesn’t ensure data reliability.
- Data Link Layer: While this layer checks for errors in frames and ensures reliable node-to-node delivery, it operates only within the same network segment. It does not guarantee end-to-end reliability.
- Physical Layer: This layer handles the transmission of raw bits over a physical medium and does not deal with error correction or data reliability.
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