Network Communications in Routed Environments

In order to appreciate the role of a router, we need to take a look at how communication happens between hosts on different networks in a routed environment. For the purpose of these illustrations, I’m going to assume that our network is running the most popular routed protocol suite, TCP/IP. We’ll begin with a look at a simple internetwork consisting of two networks, both connected to a single router. This will be followed by a look at a larger internetwork, where multiple networks are connected via many routers.

Author: Dan DiNicolo

Dan DiNicolo is a freelance author, consultant, trainer, and the managing editor of He is the author of the CCNA Study Guide found on this site, as well as many books including the PC Magazine titles Windows XP Security Solutions and Windows Vista Security Solutions. Click here to contact Dan.