Since the Internet is one huge network made up of tens of thousands of smaller networks, its use of routers is an absolute necessity. ![]() Regardless of how many networks are attached, though, the basic operation and function of the router remains the same. As the number of networks attached to one another grows, the configuration table for handling traffic among them grows, and the processing power of the router is increased. It also protects the networks from one another, preventing the traffic on one from unnecessarily spilling over to the other. It joins the two networks, passing information from one to the other and, in some cases, performing translations of various protocols between the two networks. In performing these two jobs, a router is extremely useful in dealing with two separate computer networks. ![]() ![]()
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