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Network layer

"Layer 3" redirects here. For the MPEG-1 Audio format, see MP3. For the layer in the cerebral cortex, see Cerebral cortex § Layered_structure.
OSI model
by layer
7.  Application layer
6.  Presentation layer
5.  Session layer
4.  Transport layer
3.  Network layer
2.  Data link layer
1.  Physical layer

In the seven-layer OSI model of computer networking, the network layer is layer 3. The network layer is responsible for packet forwarding including routing through intermediate routers.[2]

  1. ^ "X.225 : Information technology – Open Systems Interconnection – Connection-oriented Session protocol: Protocol specification". Archived from the original on 1 February 2021. Retrieved 10 March 2023.
  2. ^ "Layer 3". techtarget.com. Retrieved 2017-05-11.

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