Within the OSI model, which layer is responsible for delivering services like HTTP, FTP, and SMTP to user processes, effectively serving as the interface between application software and the network?
Session layer
Transport layer
Presentation layer
Application layer
The Application layer (Layer 7) is the top layer of the OSI model. It provides network-related services directly to user applications, enabling functions such as web browsing (HTTP), email transmission (SMTP), and file transfers (FTP). It supplies the protocols and interfaces that allow software to access network resources. The Presentation layer focuses on data formatting and encryption, the Session layer manages dialog control between hosts, and the Transport layer is concerned with reliable data delivery and flow control, not end-user application services.
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