Question

which function is used in the sender ,application data is sent from the transport layer to the IP layer

Answer 1

Answer:

The transport layer provides this mechanism which enables us to send packet streams from various applications simultaneously over a network. The transport layer accepts these packets from different processes differentiated by their port numbers and passes them to the network layer after adding proper headers

Answer 2

UDP function is used in the sender ,application data is sent from the transport layer to the IP layer

Explanation:

• UDP is a simple protocol that is not providing virtual circuits,  communication is not relaiable, delegate their functions to the application . packets in UDP is called datagrams, other than segments.
• UDP typically gives higher throughput and shorter latency, and is therefore often used for real-time multimedia communication  
• UDP is suitable for purposes where error checking and correction are either not necessary  for the application

Transport layer  features:

• Connection-oriented communication
• Multiplexing
• Reliability
• Congestion avoidance
• Flow control
• Same order delivery

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