Fundamentals of Computer Networks: Definitions, Classifications, and Topologies

Computer networks consist of multiple nodes (such as computers, servers, routers) connected by transmission media (cables, wireless signals) to enable data transfer and resource sharing.

Common protocols in computer networks perform different functions to ensure efficient and secure communication between devices.

Definition and components: A computer network is composed of nodes and transmission media. Devices communicate through protocols, which are the rules governing communication.

Classification: Networks can be classified by scope (WAN, MAN, LAN, PAN) or by usage (public vs. private).

Layered architecture: Typical models include the OSI seven‑layer model and the TCP/IP four‑ or five‑layer models, each layer being independent and loosely coupled.

Topology: Common network topologies include star, bus, ring, tree, and mesh.

In summary, the fundamentals of computer networking cover definitions, components, classifications, layered structures, and topologies, providing the basis for understanding and building networks.

Additional resources and links are provided for deeper study, including downloadable PDFs, PPTs, and articles on related topics such as storage systems, AI chips, InfiniBand, and cloud technologies.