Which layer hosts protocols such as HTTP, HTTPS, SSH, and NTP?

Which layer hosts protocols such as HTTP, HTTPS, SSH, and NTP?

• A. Application Layer
• B. Transport Layer
• C. Network Layer
• D. Data Link Layer

Answer: (A)

These are application-layer protocols. The Application Layer provides network services directly to programs, defining how such services are used by applications. HTTP and HTTPS define the web data exchange, SSH provides secure remote access, and NTP keeps time across systems. They rely on the transport layer (usually TCP or UDP) to move data between hosts, but their meaning, structure, and rules live at the application layer. The transport layer, by contrast, handles delivery mechanics; the network layer handles routing; and the data link layer handles local-frame transmission. So the layer hosting these protocols is the Application Layer.

These are application-layer protocols. The Application Layer provides network services directly to programs, defining how such services are used by applications. HTTP and HTTPS define the web data exchange, SSH provides secure remote access, and NTP keeps time across systems. They rely on the transport layer (usually TCP or UDP) to move data between hosts, but their meaning, structure, and rules live at the application layer. The transport layer, by contrast, handles delivery mechanics; the network layer handles routing; and the data link layer handles local-frame transmission. So the layer hosting these protocols is the Application Layer.