Building Blocks of Connectivity

Network Models: A Conceptual Framework

Networks are built upon layers of abstraction. The OSI (Open Systems Interconnection) model is a widely used conceptual framework, dividing network functions into seven layers – Physical, Data Link, Network, Transport, Session, Presentation, and Application. Each layer performs specific tasks to facilitate communication.

Protocols: The Rules of the Road

Protocols are sets of rules governing data transmission. Examples include TCP/IP (Transmission Control Protocol/Internet Protocol), which forms the foundation of the internet, and HTTP (Hypertext Transfer Protocol) for web traffic. Protocols ensure devices can understand each other.

TCP/IP: IP addresses + Port Numbers

Routing and Switching – Directing Traffic

Routers forward data packets between networks, making decisions based on network topology. Switches connect devices within a local area network (LAN), forwarding traffic based on MAC addresses. These devices are fundamental to efficient data flow.

Routing tables determine the best path for data packets.

Network Security – Protecting the Flow

Security measures include firewalls, intrusion detection systems, and VPNs (Virtual Private Networks). These protect networks from unauthorized access and data breaches. Layered security is crucial for robust network protection.

Frequently asked questions

Try it live

Everything above runs in your browser — open SPH Fluid and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.