Which of the following is a primary protocol associated with the Application layer and commonly used for web content?

• A. TCP
• B. HTTP
• C. IP
• D. Ethernet

Answer: (B)

HTTP is the primary application-layer protocol used for web content. It defines how a client such as a browser asks a server for resources and how the server replies, detailing request methods (like GET and POST), response status codes, headers, and the message body. It operates at the application layer and typically runs over TCP to ensure reliable delivery; the secure version HTTPS adds TLS/SSL for encryption. The other options belong to different layers: TCP is a transport-layer protocol that handles reliable data transfer, IP is a network-layer protocol that handles addressing and routing, and Ethernet is a data-link layer technology used for actual data transmission over physical networks.