Warriors of the Net
An entertaining resource to help you visualize networking concepts is the animated movie "Warriors of the Net" by TNG Media Lab. Before viewing the video, there are a few things to consider. In terms of concepts you have learned in this chapter, think about when, in the video, you are on the LAN, on the WAN, on the intranet, on the Internet; and what are end devices versus intermediate devices.
Though all animations often have simplifications in them, there is one outright error in the video. About 5 minutes in, the statement is made "What happens when Mr. IP doesn't receive an acknowledgment, he simply sends a replacement packet." This is not a function of the Layer 3 Internet Protocol, which is an "unreliable", best effort delivery protocol, but rather a function of the transport layer TCP protocol. IP is explained in Chapter 6 and TCP is explained in Chapter 9.
Download the movie from http://www.warriorsofthe.net