How to find out what network resources an application uses?

Question

Windows

There is an application (exe), how to find out which addresses on the network it connects to and what is transmitted back and forth?

Answer 1

the simplest is tcpview

Answer 2

For such purposes, network sniffers are used. Here is the first one issued by Google: Network Packet Analyzer or here: Free Network Analyzer
If the contents of the packets do not matter, then it will be enough to install a firewall in learning mode - questions will be asked from the application for each new connection, while it will be clear who and where establishes a connection .
Well, the last option (the most interesting) is reversing the application.

Answer 3

Wireshark to the rescue.