Layer 3

Communications Systems Glossary

Communications Systems — Open Systems Interconnection reference model — Layer 3

 

 

 

 

 

 

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Information on Layer 3

The Layer 3 is layer 3 of the ISO OSI 7-layer model. Responsible for routing data through a communication network. The Layer 3 is responsible for end-to-end message routing. Layer 3 protocols specify how addresses are assigned and how packets are forwarded from one end of the network to another.


Other topics in our resources on Communications Systems related to Layer 3 include: 
 
  • Physical layer (Layer 1)
  • data-link layer (Layer 2)
  • transport layer (Layer 4)
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  • session layer (Layer 5)
  • presentation layer (Layer 6)
    		•
  • application layer (Layer 7)
  • Datagram

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