How does a process on one host recognize a process on another?

A client-server architecture with two levels has a fatal fault. Is a multi-tier client-server design the answer to this conundrum?

1. Many systems designed in the real world need to work in synchrony with each other. This is true for web servers and IOT devices synchronizing with each other for providing online services. Consider an online food ordering system that allows the customer to create an order on a smartphone, that is received by a web server on the cloud and then transmitted to a desktop at the restaurant. When the order has been received and when the order has been completed, the desktop app sends the update to the webserver for the smartphone app to be alerted at the customer end. a. Design transition system diagrams as channel systems for smartphone app, web server and the desktop app. b. Then perform the parallel composition of the three models. Now identify, are there any unsafe possibilities. 2. Consider the following two sequential hardware circuits: (a) Give the transition systems of both hardware circuits. (b) Determine the reachable part of the transition system of the synchronous product of…

Does moving away from standard server setups on-premise and towards infrastructure as a service raise any control concerns?