tcpsshcommunicationosi

OSI Model: SSH vs HTTP


I wonder, why SSH is in the Session Layer of Model OSI, but HTTP is in the Application Layer?
as I see it, both are working over TCP/IP communication so why discriminate the two protocols to two different layers?


Solution

  • HTTP does not care what way it is sent, it simly consists of text, which can then be parsed by an application "speaking" HTTP, whereas SSH creates a "virtal connection" (session) over an existing network and allows higher-level protocolls (like HTTP) to pass more securely