A server is a computer or software system that provides resources, data, or services to other devices (clients) over a network. Servers play a crucial role in hosting applications, websites, and databases.
Types of Servers
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Web Server:
- Hosts websites or web applications.
- Examples: Apache, Nginx, Microsoft IIS.
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Application Server:
- Runs specific business applications and logic.
- Examples: JBoss, Tomcat, WebLogic.
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Database Server:
- Stores and manages database services.
- Examples: MySQL Server, PostgreSQL Server, MongoDB Server.
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File Server:
- Provides centralized file storage and access.
- Examples: Samba, Windows File Server.
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Email Server:
- Manages email delivery and reception.
- Examples: Microsoft Exchange, Postfix.
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Game Server:
- Supports multiplayer gaming environments.
- Examples: Dedicated Minecraft or CS:GO servers.
Physical vs. Virtual Servers
- Physical Server: Dedicated hardware, often in data centers.
- Virtual Server: Software-defined and runs on a physical host. Uses virtualization tools like VMware or Hyper-V.
- Cloud Server: A virtualized server hosted in the cloud. Examples: AWS EC2, Azure Virtual Machines.