Which three packets establish a TCP connection in order?

Which three packets establish a TCP connection in order?

• A. SYN, ACK, FIN
• B. ACK, SYN, ACK
• C. SYN, SYN-ACK, ACK
• D. FIN, ACK, SYN

Answer: (C)

The process of establishing a TCP connection is known as the three-way handshake. This handshake is essential for creating a reliable connection between two devices over a network. The correct sequence involves three packets: the first packet is a SYN (synchronize) packet sent from the client to the server, indicating that the client wants to establish a connection. The second packet is a SYN-ACK (synchronize-acknowledge) packet sent back from the server to the client, confirming the receipt of the initial SYN packet and also indicating that the server is ready to establish a connection. Finally, the client sends an ACK (acknowledge) packet back to the server, completing the handshake process and establishing the connection. This three-step process ensures that both the client and server are synchronized and ready to begin data communication, thus playing a critical role in TCP's reliability. In contrast, any other combination of packets would not accurately reflect the process of establishing a TCP connection. Options that include FIN (finish) packets relate to tearing down a connection rather than establishing one, and those that have the packets in a different order do not follow the required sequence of the handshake.

The process of establishing a TCP connection is known as the three-way handshake. This handshake is essential for creating a reliable connection between two devices over a network.

The correct sequence involves three packets: the first packet is a SYN (synchronize) packet sent from the client to the server, indicating that the client wants to establish a connection. The second packet is a SYN-ACK (synchronize-acknowledge) packet sent back from the server to the client, confirming the receipt of the initial SYN packet and also indicating that the server is ready to establish a connection. Finally, the client sends an ACK (acknowledge) packet back to the server, completing the handshake process and establishing the connection.

This three-step process ensures that both the client and server are synchronized and ready to begin data communication, thus playing a critical role in TCP's reliability.

In contrast, any other combination of packets would not accurately reflect the process of establishing a TCP connection. Options that include FIN (finish) packets relate to tearing down a connection rather than establishing one, and those that have the packets in a different order do not follow the required sequence of the handshake.