LayerView is a fast, lightweight packet sniffer. It will show you exactly what data your computer is sending and receiving.
After installation, LayerView should load automatically. If it does not, simply select LayerView from the LayerView Start Menu group.
The first time that LayerView loads, it will install the Packet Capture Driver. If this component is required you will be notified, and installation should only take a couple of seconds with minimal user interaction required. During this process you will probably receive a warning that you are about to install an unsigned driver - you can safely accept this security warning. (If you do not accept it then LayerView will not be able to run a packet trace. If you accidentally denied permission to install the driver, you can close and re-open LayerView to get the installation dialog back.)
Once LayerView has been installed, you will see this screen. From here you can begin using LayerView.
LayerView: Low Level View.
LayerView's Low Level View shows you a detailed breakdown of every packet which your NIC sends and receives. Depending on your network setup, it may also show network traffic to and from other computers on the network too.
The Low Level View can be accessed by clicking the Low Level toolbar button.
LayerView: Filter Expressions.
Filter expressions allow you to specify group of packets which match a certain set of criteria. They are used by LayerView's packet filtering feature to hide packets which aren't of interest, and by packet colouring to change how different packets appear in the Low Level view.
Value from protocols can be combined using boolean logic to produce a flexible all-encompassing filter expression.