Network layer

OSI model
by layer
7.  Application layer
6.  Presentation layer
5.  Session layer
  • Named pipe
  • NetBIOS
  • SAP
  • PPTP
  • RTP
  • SOCKS
  • X.225[1]
4.  Transport layer
3. 
2.  Data link layer
  • ATM
  • ARP
  • SDLC
  • HDLC
  • CSLIP
  • SLIP
  • GFP
  • PLIP
  • IEEE 802
  • LLC
  • MAC
  • L2TP
  • Frame Relay
  • ITU-T G.hn DLL
  • PPP
  • X.25 LAPB
  • Q.922 LAPF
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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