Computer Networks Tutorial

Computer Networks Tutorial

This handbook walks you through how computers communicate over networks, clearly and systematically. You’ll start with the basics of data communication and network types, then move into layered models like OSI and TCP/IP. From there, you’ll explore core protocols such as HTTP, TCP, UDP, IP, and DNS, along with routing, switching, congestion control, and network security basics.

Why this handbook matters

Every modern application depends on networking, from web apps and cloud systems to mobile apps and distributed services. Without a solid grasp of networking fundamentals, it’s hard to debug performance issues, design scalable systems, or secure data in transit. This handbook gives you the clarity needed to reason about networks, protocols, and real-world communication problems with confidence.

Who this is for

- Students and learners preparing for networking exams, interviews, or academic courses. - Software engineers and backend developers who want to understand how data flows across systems. - DevOps, cloud, and infrastructure engineers working with distributed and networked environments. - Anyone curious about how the internet, local networks, and communication protocols actually work.

Prerequisites

This course is suitable for:

• Basic understanding of computers and operating systems.
• Familiarity with programming concepts is helpful but not mandatory.
• Comfort with basic terminology like processes, memory, and files.
• Willingness to think in terms of layers, protocols, and real-world examples.