Write a one-page summary of a networked application of your choosing. Conciseness is more important than comprehensiveness, although you should strive for a balance between both. The definition of a networked application in this instance is relatively synonymous with client-server. An example would be a web browser such as Netscape or Internet Explorer. If you choose such an application, try to at least mention its peer application - in this case, it would be a web server such as Netscape Web Server or Microsoft IIS.
Although we have not yet covered these topics, if you can, describe the OSI application-layer protocol(s) used by this networked application. For example, a web browser and web server are applications, while http is an applications-layer protocol. The purpose of this exercise isn't to write a technical spec on networked applications, but to give us a pair of endpoints between which we can begin to examine network protocols.