Answer : SSL VPN operates at the Transport Layer -Layer 4 of the OSI model.
SSL VPN operates primarily at the Transport Layer – Layer 4 of the OSI model, but its implementation can extend to the Application Layer – Layer 7 as well.
Transport Layer – Layer 4
SSL VPN creates a secure and encrypted connection between the client and the server at this layer, using SSL/TLS protocols. It encapsulates the application layer protocols such as HTTP, FTP, SMTP, and others, providing secure end-to-end communication.
Application Layer – Layer 7
Although SSL VPN operates at the transport layer, it can extend its functionalities to the application layer. This is because SSL VPN can provide secure access to specific applications rather than the entire network.
Conclusion
SSL VPN operates primarily at the transport layer, ensuring secure and encrypted connections between clients and servers. However, its capabilities extend to the application layer, providing secure access to specific applications.