Which layer is responsible for process to process delivery?

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  1. Physical layer
  2. Data link layer
  3. Transport layer
  4. Network layer

Answer (Detailed Solution Below)

Option 3 : Transport layer
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Detailed Solution

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The correct answer is Transport layer.

key-point-imageKey Points

  • The Transport layer is responsible for process-to-process delivery of the entire message.
    • This layer ensures that data is transferred from one process to another reliably and without errors.
    • It manages the establishment, maintenance, and termination of the logical connection between the two communicating hosts.
    • The Transport layer protocols include TCP (Transmission Control Protocol) and UDP (User Datagram Protocol).
    • TCP provides reliable, connection-oriented service, ensuring that data is delivered in the correct order and without errors.
    • UDP provides a connectionless service with minimal error recovery features, making it faster but less reliable than TCP.

additional-information-imageAdditional Information

  • The Transport layer also handles flow control, ensuring that a sender does not overwhelm a receiver with too much data at once.It is responsible for multiplexing and demultiplexing of data, meaning it can handle multiple communication streams at the same time.
  • The Transport layer can provide error detection and correction mechanisms to ensure data integrity.
  • Port numbers are used at the Transport layer to identify different processes or services running on the same device.
  • This layer also provides mechanisms for congestion control to manage network traffic and avoid congestion.
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