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9.Which of the following describes how TCP adds reliability to communication? (Choose two.)

Hosts using TCP set up virtual circuits at the beginning of the transmission using the three-way handshake.
Hosts using TCP set the error-checking frequency at the beginning of the transmission and maintain this frequency for the duration.
The receiving host acknowledges that it has received the expected number of segments and requests additional data.
The receiving host acknowledges any incorrectly received data and requests retransmission of damaged or missing bytes.