### 1. **Client-Server Scheme**  
In this scheme, the system is divided into clients and servers. Clients request services or resources, and servers provide these services.  
- **Features**: Centralized control, easier management, and clear separation of roles.  
- **Examples**: Web applications, database servers.  
- **Advantages**: Simplifies resource management and provides structured communication.  
- **Disadvantages**: Can become a bottleneck if the server is overloaded or fails.

### 2. **Peer-to-Peer (P2P) Scheme**  
In this scheme, all nodes (peers) are equal and share resources without a centralized server. Each node acts as both a client and a server.  
- **Features**: Decentralization, dynamic scalability, and resource sharing.  
- **Examples**: File-sharing networks (e.g., BitTorrent), blockchain systems.  
- **Advantages**: Fault-tolerant, scalable, and removes dependency on a central server.  
- **Disadvantages**: Difficult to manage, and performance depends on the cooperation of peers.  

Both schemes are widely used in distributed systems depending on the application’s needs, offering trade-offs in terms of scalability, fault tolerance, and complexity.

What are the two schemes of distributed system?

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1. Client-Server Scheme

In this scheme, the system is divided into clients and servers. Clients request services or resources, and servers provide these services.  

Features: Centralized control, easier management, and clear separation of roles.  
Examples: Web applications, database servers.  
Advantages: Simplifies resource management and provides structured communication.  
Disadvantages: Can become a bottleneck if the server is overloaded or fails.

What are the two schemes of distributed system?

1. Client-Server Scheme

2. Peer-to-Peer (P2P) Scheme