Advanced Networking Administrator Test Prep

Answer: B - Application layer of the OSI model facilitates communication between software applications and lower-layer network services.

Key Takeaway: The application layer is the OSI layer closest to the end user, which means that both the OSI application layer and the user interact directly with the software application. This layer interacts with software applications that implement a communicating component. Its functions include identifying communication partners, determining resource availability, and synchronizing communication. When identifying communication partners, the application layer determines the identity and availability of communication partners for an application with data to transmit. Some examples of application layer implementations include HTTP, FTP, and SMTP.