Lecture Description: This lecture explores the OSI (Open Systems Interconnection) Model and the TCP/IP Model, which are fundamental frameworks in network communication. We begin by discussing the OSI model, developed by the International Standards Organization (ISO), which standardizes how different systems communicate over a network. The OSI model divides network communication into seven distinct layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application. Each layer serves a unique purpose, from handling data bits to providing user interface support, and ensures seamless data transfer across varied systems.
We delve into each layer’s functions, from the physical connections in the Physical Layer to user interactions in the Application Layer. Additionally, we explore peer-to-peer processes, where each layer interacts with its counterpart on another machine, ensuring that data moves smoothly across the network.
Following the OSI model, we introduce the TCP/IP model, developed by the Department of Defense. TCP/IP is more concise, consisting of four layers—Application, Transport, Network/Internet, and Data Link/Physical. We compare TCP and IP, which handle data transport and routing, respectively, and discuss how TCP/IP segments data into packets, ensuring reliable and accurate delivery.
By the end of this lecture, participants will gain a clear understanding of the OSI and TCP/IP models, equipping them with knowledge to design, troubleshoot, and manage network systems effectively.
