After receiving connection request message, the receiver
daemon will check if the destination address exists in its
subsystem. If it exists, the receiver daemon sends connection
success confirmation message in which synchronization bit SYN
is 1, acknowledgement bit ACK is 1 and message sequence SEQ
is 1. If it doesn’t exist, the receiver daemon sends connection
failure message in which synchronization bit SYN is 1,
acknowledgement bit ACK is 1 and message sequence SEQ is 0.
The process of creating connection successfully is shown in
Figure 3.