Page "Router (computing)" Paragraph 1
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A router is a device that forwards data packets between computer networks, creating an overlay internetwork.
When a data packet comes in one of the lines, the router reads the address information in the packet to determine its ultimate destination.
Then, using information in its routing table or routing policy, it directs the packet to the next network on its journey.
A data packet is typically forwarded from one router to another through the networks that constitute the internetwork until it gets to its destination node.
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