Viewing a summary of network activity
To view a simple summary of current network activity:
On the Home tab, in the Statistics group, click Network Summary.
 
This reveals the Network Summary tool, which lists packet size distribution, error count, seen protocols, and other general network information.
Click the Start button to activate the tool, or click Settings for more configuration options. Since this tool is basic, the only configurable option is to enable or disable the use of your current filter.
Results can be saved in a comma delimited file using File > Save > Save Data.