Book Description

In the rapidly evolving world of technology, data communication plays a pivotal role in enabling the exchange of information across various systems and networks. This book provides a comprehensive overview of the fundamental concepts, components, and techniques involved in data communication. Chapter 1 introduces the readers to the basics of data communication, including an exploration of its applications and the components of a data communication system. The chapter also covers essential topics such as data representation and the advantages of the binary number system. Chapter 2 delves into the realm of data transmission, discussing different modes of data transmission and various transmission media. It also explores multiplexing techniques and provides insights into guided and unguided transmission media. In Chapter 3, the focus shifts to signal encoding techniques. The chapter explores the differences between analog and digital signals and discusses digital-to-analog conversion. It also examines popular encoding methods such as AM, FM, Manchester coding, and differential Manchester coding. Chapter 4 expands on digital communication by exploring different digital modulation methods, including frequency shift keying (FSK), phase shift keying (PSK), and quadrature amplitude modulation (QAM). The chapter also explores the uses of computer networks, local area networks (LANs), and wide area networks (WANs). In Chapter 5, the concept of network topology takes center stage. The chapter explains various line configurations and explores different network topologies, such as bus, star, ring, mesh, and tree. It also introduces the layered architecture, including the OSI model and the TCP/IP model. Chapter 6 provides an introduction to the data link layer, covering its functions and design issues. The chapter discusses error detection and correction techniques and explores elementary data link protocols. It also delves into multiple access protocols, wireless local area networks (WLANs), and switching techniques. Chapter 7 focuses on "Data Link Control Protocols and High-Level Data Link Control (HDLC)." It explores the functions and design issues of the Data Link Layer, including error detection and correction techniques. The chapter also discusses elementary data link protocols, such as Sliding Window Protocols and HDLC, and their advantages and disadvantages. Additionally, it delves into the Medium Access Sublayer and multiple access protocols, highlighting the advantages and disadvantages of these protocols. Lastly, the chapter covers wireless local area networks (WLANs) and introduces different switching techniques. This book serves as a valuable resource for students, professionals, and enthusiasts seeking to gain a solid understanding of data communication. By combining theoretical explanations with practical examples, it aims to empower readers with the knowledge and skills necessary to navigate the complex world of data communication effectively