1.1 Explain concepts related to the Open Systems Interconnection (OSI) reference model

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Across
  1. 3. Logical address assigned to a device on a network
  2. 4. Layer 3 data unit, contains source and destination IP addresses
  3. 8. Total number of layers in the OSI model
  4. 9. First OSI layer, deals with cables and bits
  5. 11. Seventh OSI layer, where users interact with network services
  6. 17. Sixth OSI layer, deals with formatting, encryption, and compression
  7. 19. Fourth OSI layer, manages segmentation and TCP/UDP
  8. 21. Device that uses Layer 3 to forward data between networks
Down
  1. 1. Layer 2 data unit, contains MAC addresses and error checking
  2. 2. Smallest unit of data, used in Layer 1
  3. 5. Wrapping data with headers as it moves down the OSI model
  4. 6. Device that uses MAC addresses to forward data within a network
  5. 7. Process of unwrapping headers as data moves up the OSI model
  6. 10. Data unit at Layer 4 in the OSI model
  7. 12. Unreliable, faster protocol at the transport layer
  8. 13. Second OSI layer, handles MAC addressing and switching
  9. 14. Third OSI layer, focused on IP addressing and routing
  10. 15. Fifth OSI layer, responsible for keeping ongoing conversations alive
  11. 16. Reliable protocol at the transport layer
  12. 18. Address used by switches to identify devices
  13. 20. Layer 1 device that broadcasts traffic to all connected ports