Why is udp needed? Why cant user program directly access ip?
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UDP reduces overhead because it does not add flow control, error control, or sequence delivery unlike connection-oriented services. UDP is used for the transmission of data in which delivery of the data is more important than accuracy. Therefore, UDP is needed.
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☑ Applications can't access IP directly due to the lack of application level (port) ad- dressing. UDP adds a port addressing capability to IP. It also includes an optional checksum for the user data which provides error checking
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