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At what layer of the OSI model do routers operate?
Data Link
Network
Physical
Base
Although some modern routers have had more functionality added to them so that they can perform more tasks on a network, routers generally operate in the network layer of the OSI model, or layer 3.
http://www.computerworld.com/article/2469896/network-hardware-solutions/the-network-layer--understanding-layer-3-of-the-osi-model.html
https://en.wikipedia.org/wiki/OSI_model
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