Assuming you are using the OSI Modem a router sits on Layer 3: Network
A router must implement the Physical layer, the Link layer, and the Network layer
Router works in Network Layer of OSI model
All layers - but to the greatest extent, the distinctive work done by the router - specifically, routing packets - corresponds to layer 3.
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Yes. A router will de-capsulate an frame to verify it was destined for itself. Frames are layer 2.
Router is a Layer 3 (Network Layer)device that checks packet's IP Address at input interface & routes them to interface connected to destination network if available.
Perhaps you mean a router?
Network Layer - Does path determination and logical addressing.
router operates on Layer 3 and can be used as a switch
Do all planets and satellites lie on the same gravitational layer?
the Layer 2 source and destination address
Routers operate in layer 3 because they must use the logical network address to determine which network to route the packet to. Logical addressing is a feature of layer 3, therefore a router is a layer 3 device.