The student appreciates the time you spent describeing what happens to the data as it moves through the OSI model layers, but he wonders why he should ever care about the OSI model or data frames. He says he wants to become a network architect and concern himself with 
routers, switches, and cabling. The student indicates that he doesn't care about the little details like packets. In response, describe how OSI model layers can affect a network's design and networking in general. For ex, if the student wants to concentrate on designing a network that makes uses of routers, what layer of the OSI model might he take the greatest interest in? How can the OSI model be a useful reference when troubleshooting network problems? For instance, if one node can send and receive data, yet the data are not encoded properly, at what layer of the OSI model might problems be occurring?