john mater wrote:Modify the code to add a second Physical Layer object to represent a return path for messages. Write the code for a new class called Echo which loops indefinitely, receiving and then transmitting messages between the two Physical Layers.
Sometimes in working with a project (or domain), you get into project specific (or domain specific) terminology. It is generally a good idea to not allow this terminology to leak out -- because quite frankly, most people not working on the project (or in your domain) will have no idea what you are actually talking about.
I read the topic three times, and don't have any idea what you are asking. Tossing in a wad of code doesn't help either.
Henry