Cheat Sheet for Computer Networking and Internet Communication
Summary of Computer Networks and Internet Communication including OSI model, internet protocols, types of networks, IP and MAC addresses, and network components.
Computer Networks and Internet Communication
1.1 OSI (Open Systems Interconnection) Reference Model
The OSI Reference Model is a globally standardized network design. OSI is concerned with open systems, which are systems that can communicate with other systems. The OSI model comprises seven layers:
Layers 1–3 are located at the communications subnet boundary. Layers 1–4 are concerned with communication technologies. Layers 5–7 are concerned with user applications.
1.1.1 Layer 7 — Application Layer
The place at which apps gain access to network services. The application layer represents services that directly enable software applications such as file transfers, database access, e-mail, and so on.
1.1.2 Layer 6- Presentation Layer
The presentation layer is concerned with the representation of transmitted data. Transforms various data representations from the Application layer into a consistent standard…
