An application program at a computer A transfers an object to a computer B over the internet, using TCP. Some data is lost on the way.

Question

Answer

The application program does not need to handle the loss, the routers take care of re-transmitting the data.

Answer

The application program does not need to handle the loss, because TCP at A and B takes care of retransmitting the missing data.

Answer

The application program needs to handle the loss, for example by re-transmitting the missing data.

Answer

This scenario is impossible, packets are never lost in the internet.

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