Switches, routers work in data link layer and network layer, respectively, for example, the router itself does not have the data link layer, physical machine itself also has a data link layer and network layer, why do you say work routers in the network layer, network layer is not the same as they say? Now, a little meng,

CodePudding user response:

Routers provide 2, 3 layers,

Both MAC packet forwarding, and across the network segment routing,

Said is wrong, please correct me,