Great conclusion: > Theoretically, even more than three handshakes would not guarantee a "completely reliable" TCP connection. However, through three handshake

Great conclusion: > Theoretically, even more than three handshakes would not guarantee a "completely reliable" TCP connection. However, through three handshakes, it can at least be confirmed that the connection is "basically usable." Increasing the number of handshakes would merely increase the confidence level in the "connection availability." 3 is an arbitrary number, but one that works well in practice.