How is a three-way handshake used to secure network communications?

"A three-way handshake is a technique used to create a connection between a host and a client across the network. It is called a three-way handshake because it requires three steps. It starts with the client sending a synchronized packet to the server to determine if the server is functioning and has open ports. Next, the server will respond to determine if the client has open ports. Finally, the client acknowledges the server's request and responds, confirming that a communication channel has been established."

This is an example of a hybrid technical and operational question. The question contains elements of a specific technology used for this position, as well as how you employ the technology in your daily work. Hybrid questions are answered in the same manner as technical and operational questions. Keep your answer brief and to the point, address the interviewer's question directly, and be prepared for follow-up questions from the interviewer in case they want to explore the topic in more detail.