The document discusses the concept of data communication and networking, detailing the advantages and disadvantages of computer networks, such as resource sharing, increased storage capacity, cost efficiency, and security issues. It highlights the benefits and drawbacks of Local Area Networks (LANs) specifically. The overall content aims to provide a comprehensive introduction to computer networking and its implications.

1. Data Communication and Networking

2. Introduction

3. Introduction

22. Computer Network

24. Advantages of Computer Network
•Sharing of Resources
•Increased Storage Capacity
•Increased Cost Efficiency
•Backup and Recovery
•Cheaper and Faster Communication
•Centralized Control

25. Disadvantages of Computer Network
•Security Issue
•Rapid Spread of Computer Virus
•Expensive Setup
•Dependency on main server
•Needs special technical knowledge

26. Types of Computer Network

28. Advantages of LAN

29. Disadvantages of LAN