c++ -- protocols

1.the protocol system boundries will have n number of static classes
2.these statics are meant to link the new calls to entry points and in way sync into c++
3.at entries event object that has a span across the layers have to be created
4.if there are 3 layers, the event thus created together with polymorphism ,a single pointer
has to be casted to get appropriate layer data structures
5.physical medium better to design half duplex objects

java abstract, interfaces

concept of abstract === nterface
both needs implementations in the included classes
interfaces can be extended independently