Network Layer

Jun 27, 2023

• Application Layer
  • Bi-directional reliable byte stream between two applications, using application-specific semantics (e.g. http, bittorrent).
• Transport Layer
  • TCP and UDP
  • Guarantees correct, in-order delivery of data end-to-end. Congestion Control
• 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

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