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    Question

    Which layer in the OSI model is responsible for end-to-end communication and error-free delivery of data between hosts?

    A Physical layer Correct Answer Incorrect Answer
    B Data link layer Correct Answer Incorrect Answer
    C Transport layer Correct Answer Incorrect Answer
    D Network layer Correct Answer Incorrect Answer
    E Application layer Correct Answer Incorrect Answer

    Solution

    The transport layer (Layer 4) is responsible for ensuring reliable data transfer between two hosts. It manages flow control, segmentation, error detection, and retransmission of lost data packets, ensuring that data is delivered correctly. Why Other Options are Wrong: a) Physical layer handles the transmission of raw data. b) Data link layer provides error detection and correction within a single network. d) Network layer handles routing and logical addressing, not end-to-end communication. e) Application layer interacts directly with end-user applications but doesn’t handle data transmission.

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