UNIX network programming
Using pathchar to estimate Internet link characteristics
SIGMETRICS '99 Proceedings of the 1999 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
Network measurement and path characterization using user datagram protocol
Journal of Computing Sciences in Colleges
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Ping and traceroute are two popular Internet tools that allow network administrators and users to detect problems on the Internet. The most popular use of ping is to find out whether a host on a network is online or not. However, the most popular use of traceroute is to identify routers along an Internet path. Each tool has many other uses often ignored by common users. This work describes how to use these tools to find the bandwidth of an Internet link, discover the path MTU (Maximum Transmission Unit), identify the bottleneck link in a path, and detect and measure upstream and downstream bandwidths of an asymmetric link. By conducting such experiments, students in networking courses can obtain a good insight of an Internet path and be interested in in-depth research and further study in computer networking.