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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.
Before data can be sent between applications using TCP, a connection must be established through a process known as the TCP three-way handshake. This process involves the initiation of a connection by having one application (client) send a request to another application (server) and both sides agree to the connection before any data is transmitted. This ensures reliable communication between the two applications.