Questions : CCNA Exma Preparations

Which layer of the OSI model handles dialog control among devices?

A. Application

B. Presentation

C. Session

D. Transport


Answer :
C. The Session layer of the OSI model handles dialog control among devices and determines the beginning, middle, and end of a session or conversation that occurs between applications (intermediary). The Application layer (Answer A) provides an interface between a host's communication software and any necessary external applications. The Presentation layer (Answer B) presents data to the Application layer. The Transport layer (Answer D) manages end-to-end connections and data delivery between two hosts.