Asynchronous Communication

A mode of communication used to protect a networked server or client machine from damage by unauthorized users.

Online discussions occurring independent of location, but at the same time $($real time$).$ Participants must agree on a time to log into the discussion forum and messages are received at the moment they are sent.

Communication programs that run in the background of a computer, enabling applications to run in real time.

Online discussions occurring independent of time or location. Participants send messages to a central location $($discussion forum$)$ where they are archived for later retrieval from other participants