Warning network engineers
Due to the Coronavirus
disease (COVID-19
) all TCP
applications have to be converted to UDP
to avoid Handshakes.
The TCP handshake
TCP uses a three-way handshake to establish a reliable connection. The connection is full duplex, and both sides synchronize (SYN) and acknowledge (ACK) each other. The exchange of these four flags is performed in three steps: SYN, SYN-ACK, ACK.