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Do routers control IP addressing

Updated: 11/8/2022
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12y ago

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The answer to this question will depend to some extent on what you are calling a router and the function that the 'router' is being used for.

Originally in computer networking the function of a 'router' was simply to route packets of data between two different networks, typically when these were using different networking protocols. In this usage the router only controls the flow of the data packets based on the IP address of the destination, it does not control the addresses themselves.

In modern usage the term 'router' has come to be applied to a much more complex device, commonly used at home, to run a small home network and to connect this home network to the internet. These devices contain (primarily) a real router as above and also a network server. In this role one of the functions of the server component of the router is to assign the IP addresses to each of the devices on the home network as they connect to it. So, in this usage - yes the router controls IP addressing. This function is called DHCP or "dynamic host configuration protocol"

You can configure most routers to function as a DHCP server, or turn it off. Most routers have this turned on as default.

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