EasyNetMonitor is a lightweight portable tool for monitoring computers in your local network and any internet hosts.

Just start EasyNetMonitor, open the popup menu in the tray and get the information about your computer's network state.

EasyNetMonitor Features:

You don't need to install it, just download and use free network monitor EasyNetMonitor anywhere
You can monitor any internet host
Email notifications (your computer name should be in English letters only)
Sound notifications

Similar:
How to Improve Your Wireless Network Performance
Hide or Block Neighbor's Wi-Fi Networks on Windows
Windows Couldn’t Automatically Bind the IP Protocol Stack to the Network Adapter
Windows Can’t Get the Network Settings From the Router