Notes and Reflections on Books and Media
by Hannah Leitheiser
An Introduction to Computer Networks
Peter L Dordal
The author of this computer networking textbook claims that research shows most network congestion occurs near the endpoints, not so much in the backbone routers of the giant ISP's (although this can change), and, from a practical perspective a case might be made for offering quality of service guarantees for real-time traffic such as streamed video or voice-over-IP, where jitter -- variations in data transfer rates -- can make the user more upset than it would in something like a file download.