Microsoft publishes protocol documentation on MSDN that is intended to make it easier for others to develop interoperable implementations. “System Documents” provide overviews of system behavior for key systems such as Active Directory, File Sharing and Windows Security. The MSDN documentation for each of the System Documents is available here. We've recently released sets of annotated network captures on the SysDoc CodePlex Site which cover a subset of scenarios for each of the System Documents.
For each system component a few choice scenarios were captured and annotated. For example, File Systems have annotated traces for finding a file and configuring a server. Obviously, it would be quite an undertaking to annotate every scenario, but these annotations attempt to cover typical scenarios or a breadth of components.
Starting with Network Monitor 3.3, we can annotate a trace with comments. For more info about trace commenting please reference our blog called Frame Commenting is Here. Frame annotation provides a convenient way to describe what is happening at specific frames in a trace. Each commented frame has a # symbol next to the frame number. Clicking on a frame with comments populates the Frame Comments window in the UI. There are also ways to go to the next comment, search for a comment, and add a comment title column to the Frame Summary window.
Besides helping you to understand a specific scenario, these annotated traces can be used to get a feel for how you might dissect a trace with your own scenarios. Getting oriented in a trace for an unfamiliar protocol is one of the first steps. With these annotated traces, you have some well documented examples to get your started. We hope you find them useful.