BRAIN Journal-About the Design of QUIC Firefox Transport Protocol-Figure 3. An example of a network switch

 Seamless network transition: While switching networks, QUIC can adapt to a network or a subnet switch (illustrated in Figure 3). This means that if the IP address of the device is changed, then the QUIC connection is not broken or lost. Unlike the TCP protocol where the connection is defined by the IP address and a port number, QUIC connections are defined by a connection ID. Whenever a network switch occurs, QUIC detects it and sends a piggybacked notification to the other party by indicating the new IP address and connection ID. In this way, the communication can resume normally. In contrast, TCP a new connection has to be established.