Question

what would a server app communicate with
virtual app
a server computer
it would be unable to communicate
client app

Explanation:

In a client - server model, a server app is designed to communicate with client apps. The server provides services or data to the client apps. A virtual app is not the typical communication partner for a server app in the standard client - server architecture. A server app runs on a server computer, but it's the client apps that request and receive information from it. And it is not unable to communicate as that goes against the purpose of a server app.

Answer:

Client App