Computer Networks 112

9.1 Introduction to Computer Networks

Computer networks are systems that connect multiple computers and devices to share resources, exchange information, and communicate efficiently. The NCERT textbook introduces computer networks as the backbone of modern communication, enabling organizations to streamline operations, enhance productivity, and facilitate management functions. Networks can be as small as connecting two computers in a room or as vast as linking thousands of devices across continents. The chapter emphasizes the role of networks in management, highlighting how they support data sharing, centralized control, and collaborative work environments. The section also discusses the evolution of networks, from simple point-to-point connections to complex architectures like the Internet. It explains how networks are essential for business applications such as email, file sharing, and enterprise resource planning (ERP). The introduction sets the stage for understanding different types of networks, their components, and their significance in management contexts.

• Computer networks connect multiple devices for resource sharing.
• Networks facilitate communication and data exchange in organizations.
• They support management functions like centralized control and collaboration.
• Networks range from small local setups to global systems like the Internet.
• Evolution of networks has enabled advanced business applications.
• Networks are crucial for modern management and operational efficiency.
• 📌 Computer Network: A system connecting computers and devices for communication.
• 📌 Resource Sharing: Using networked devices to access shared hardware or software.

9.2 Types of Computer Networks

This section categorizes computer networks based on their size, scope, and purpose. The NCERT textbook identifies three primary types: Local Area Network (LAN), Wide Area Network (WAN), and Metropolitan Area Network (MAN). LANs connect devices within a limited area, such as a single building or campus, enabling fast and secure communication. WANs span large geographical areas, linking multiple LANs through public or private transmission systems, often using leased lines or satellite links. MANs cover larger urban areas, providing connectivity across cities. The section explains the characteristics, advantages, and limitations of each network type. It also discusses how organizations choose network types based on their operational needs, cost, and scalability. The section emphasizes the importance of understanding network types for effective management and planning.

• LAN connects devices within a small geographic area.
• WAN links devices across large distances, often using public infrastructure.
• MAN provides connectivity within a city or metropolitan region.
• Each network type has distinct features and applications.
• Organizations select network types based on requirements and resources.
• Understanding network types aids in efficient management planning.
• 📌 LAN (Local Area Network): Network within a limited area.
• 📌 WAN (Wide Area Network): Network covering large geographical regions.
• 📌 MAN (Metropolitan Area Network): Network spanning a city.