4 Layer Internet Model

  • Application Layer
  • Transport Layer
  • Network Layer
    • No need to concern how packets are sent via link layer
    • Delivers datagrams end-to-end. Best-effort delivery, no guarantees. Must be used with the Internet Protocol.
  • Link Layer
    • Delivers data over a single link between an end host and router, or between routers

7 Layer OSI Model

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7 Layer OSI Model

  1. Physical Layer
  2. Data Link Layer
  3. Network Layer
  4. Transport Layer
  5. Session Layer
  6. Presentation Layer
  7. Application Layer
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