Top layer for two applications in one

1. What layer creates a connection between 2 applications?
2. How can you display 2 windows at the same time?
3. Why is application layer at the top?

What layer creates a connection between 2 applications?

The transport layer provides an end-to-end connection between two applications that are running on different hosts. Of course the transport layer provides this logical connection regardless if the hosts are in the same network.

How can you display 2 windows at the same time?

Select the Task View icon on the taskbar, or press Alt-Tab on your keyboard to see apps or switch between them. To use two or more apps at a time, grab the top of an app window and drag it to the side.

Why is application layer at the top?

Application layer is the highest level of open systems, providing services directly for the application process. It allows a user to access, retrieve and manage files in a remote computer. It provides the basis for email forwarding and storage facilities.