A client-server network consists of clients that request services and servers that provide them, connected through infrastructure like routers and switches. Key components include various types of clients (e.g., computers, smartphones) and servers (e.g., web, file, database, mail). Advantages include centralized resources and scalability, while disadvantages include high costs and potential single points of failure.

1. Introduction to Client-Server
Network

2. What is a Client-Server Network?
• Client: A device or software that requests services or resources
• Server: A device or software that provides services or resources
• Network: The connection that allows communication between
clients and servers

3. Key Components of Client-Server Network
• Clients: Examples include computers, tablets, smartphones
• Servers: Examples include web servers, file servers, database servers
• Network Infrastructure: Routers, switches, cables, and wireless
connections

4. How Client-Server Networks Work
• Clients send requests to servers
• Servers process requests and send responses back to clients
• Example: Accessing a webpage (client request) and receiving the
webpage data (server response)

5. Types of Servers
• Web Servers: Serve web pages to clients (browsers)
• File Servers: Store and manage files for network users
• Database Servers: Provide database services to other computer
programs or computers
• Mail Servers: Manage and deliver email

6. Advantages of Client-Server Networks
• Centralized Resources: Easier management and updates
• Scalability: Easily add more clients or servers
• Security: Centralized control over data and resources
• Reliability: Robust systems with redundancy and backups

7. Disadvantages of Client-Server Networks
• Cost: Expensive setup and maintenance
• Complexity: Requires skilled personnel to manage
• Single Point of Failure: If the server fails, clients lose access to
services

8. Client-Server Models
• Two-Tier Architecture: Direct communication between client and
server
• Three-Tier Architecture: Includes a middle layer (application server)
for business logic
• N-Tier Architecture: Multiple layers for enhanced functionality and
flexibility

9. Real-World Applications of Client-Server
Networks
• Internet Browsing: Client browsers and web servers
• Email Services: Clients (email software) and mail servers
• Online Banking: Clients (banking apps) and banking servers
• Corporate Networks: Employee computers (clients) and company
servers