Computer Networks – Unit 1 | Introduction, Types, Topologies (DBATU B.Tech CSE Notes)
Introduction: In today’s digital world, computer networks play a vital role in how we communicate, share, and access information. A computer network is a group of two or more computers that are connected together to share resources such as files, printers, internet connections, and applications. These networks allow users to interact with each other and with different devices efficiently and quickly, whether they are in the same room or on opposite sides of the world. From sending an email to attending online classes, streaming movies, or using social media — everything runs on computer networks. Understanding how these networks work is essential for every Computer Science student, as it forms the foundation for more advanced topics like cybersecurity, data communication, and cloud computing. This unit introduces the basic concepts of networking, including its definition, goals, components, types, and network topologies. You’ll learn how networks are built, how devices com...