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Felicia will tell that she uses the OSI model's 7th layer when deploying a virtual private network (VPN) that uses secure shell (SSH).
What Is the OSI Model?
The Open Systems Interconnection (OSI) model defines seven layers through which computer systems communicate over a network. It was the first standard model for network communications, and it was adopted in the early 1980s by all major computer and telecommunications companies.
The modern Internet is based on the simpler TCP/IP model rather than the more complex OSI model. The OSI 7-layer model, on the other hand, is still widely used because it helps visualize and communicate how networks work, as well as isolate and troubleshoot networking problems.
OSI was introduced in 1983 by representatives from major computer and telecommunications companies, and it was adopted as an international standard by ISO in 1984.
7th Layer (Application Layer)
End-user software such as web browsers and email clients use the application layer. It provides protocols that enable software to send and receive data as well as present meaningful data to users. The Hypertext Transfer Protocol (HTTP), File Transfer Protocol (FTP), Post Office Protocol (POP), Simple Mail Transfer Protocol (SMTP), and Domain Name System are all examples of application layer protocols.
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