How is data transmission done in the OSI model

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I want to understand how data moves through the OSI (Open Systems Interconnection) model when two devices communicate. My questions are:

  • What happens at each of the seven layers (Physical, Data Link, Network, etc.)?
  • How does encapsulation and de-encapsulation work in data transmission?
  • What protocols operate at each layer (e.g., TCP, IP, HTTP, Ethernet)?

A step-by-step example of data being transmitted from a sender to a receiver using OSI model layers would be helpful.

Feb 26 in Cyber Security & Ethical Hacking by Anupam
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