OSI layer

hassantalal785

At which OSI layer a logical connection between 2 hosts is created ? Kindly explain also . I think it is session because its function is to create and tear sessions.

Iristheangel

It is the session layer. I think Wikipedia explains it aptly enough:
"The session layer controls the dialogues (connections) between computers. It establishes, manages and terminates the connections between the local and remote application. It provides for full-duplex, half-duplex, or simplex operation, and establishes checkpointing, adjournment, termination, and restart procedures. The OSI model made this layer responsible for graceful close of sessions, which is a property of the Transmission Control Protocol, and also for session checkpointing and recovery, which is not usually used in the Internet Protocol Suite. The session layer is commonly implemented explicitly in application environments that use remote procedure calls. On this level, Inter-Process communication happen (SIGHUP, SIGKILL, End Process, etc.)."