Network layer of osi model, PHP Web Programming

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This layer is responsible for routing a packet in the subnet i.e., from source to destination nodes across multiple nodes in the similar network or across multiple networks. This layer also makes sure the successful delivery of a packet to the destination node. The network layer performs the given functions:

  • Routing: To search the optimal route
  • Congestion control: which is depend on two approaches?

(i) Increase on the resources

(ii) Decrease the word

  • Accounting and billing

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