Where user-facing protocols like HTTP (web), SMTP (email), and FTP (files) reside. The Interaction: Client-Server Programming
Manages end-to-end communication. TCP (Transmission Control Protocol) provides a reliable, connection-oriented service by sequencing packets and retransmitting lost data. UDP (User Datagram Protocol) offers a faster, "best-effort" connection for real-time needs like streaming. Internetworking with TCP IP. Client Server Prog...
Handles the physical transmission of data via cables, fiber optics, or wireless signals. Where user-facing protocols like HTTP (web), SMTP (email),
A passive entity that "listens" on a specific port. It stays ready to process requests and provide resources (like a website or a database entry). UDP (User Datagram Protocol) offers a faster, "best-effort"
The "routing" layer. It uses IP addresses to ensure data packets find their way from the source host to the destination across multiple networks.
Internetworking is made possible by the four-layer TCP/IP model, which abstracts the complex process of moving data into manageable stages: