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Before data can be sent between applications using transmission control protocol (TCP), which of the following must occur? A. IP connection must be established.
B. TCP connection must be established.
C. TCP messages must be divided into segments.
D. IP packets must be divided into frames.
The correct answer is B. TCP connection must be established.
Explanation: Before data can be transmitted using Transmission Control Protocol (TCP), a connection must be established between the applications communicating over the network. This process is known as the TCP handshake, which involves the exchange of a series of packets to confirm that both sides are ready for data transmission. Once this connection is established, the actual data can be sent in a reliable manner.