Layers of ISO-OSI model

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Across
  1. 3. node-to-node data transfer
  2. 5. transmitting data bits across the network
  3. 6. provides services to the user
  4. 7. responsible for encryption,compression
Down
  1. 1. moving packets from source to destination
  2. 2. manage,terminate the session
  3. 4. process to process delivery