Discussion
What layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model?
Answer: B
Correct answer: Host-to-Host
The DoD model’s four layers map onto the OSI seven as follows: Application covers OSI layers 5 to 7, Host-to-Host corresponds to Transport, Internet to Network, and Network Access to Data Link and Physical. Host-to-Host is where TCP and UDP live, which is the practical way to remember it.
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