Router
A router is a network device that connects multiple, often dissimilar, network segments into an internetwork. The router, once connected, can make intelligent decisions about how best to get network data to its destination based on network performance data that it gathers from the network itself. Routers are very complex devices. Often, routers are computers unto themselves with their
own complex operating systems to manage the routing functions (Cisco’s IOS, for example) and CPUs dedicated to the functions of routing packets. Because of their complexity, it is actually possible to configure routers to perform the functions of other types of network devices (like gateways, firewalls, etc.) by simply implementing the feature within the router’s software.
Example:
Router
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