Compare OSI model with TCP$/$IP model. Consider you are part of a network developing team tasked with developing and establishing an efficient network for a small$-$sized company. To ensure the network operates smoothly, the team must understand how data is processed at each layer of the TCP$/$IP model. In this scenario, Application A on computer X sends a message to Application B on computer Y$.$ Computer X is connected to Router R$1,$ which is then connected to Router R$2,$ and finally, Router R$2$ is connected to computer Y$.$ Explain the data processing that occurs at each layer of the TCP$/$IP model for this message transmission.