Serial Protocol Driver Stack

The static structure diagram shown to the left is a typical protocol driver stack.

This static structure provides:

• Support for both Multi-drop or Point to Point communications protocols.
• Protocol abstraction to facilitate multiple protocol implementations.
• I/O Device specific façade to the application.
• Simulation capability to enable automated testing of the full protocol stack.
• Port abstraction allowing implementation of a protocol via different port types. e.g USB, TCP, or RS232.
  

This stack does not include support for:

• Dynamic routing or path modelling.
  
• Redundant paths.
• Host level redundancy.
• Use of multiple port channels (multi-link protocols).
  

The diagram has notes giving a short role description for each class.