What Is a Server? Get to Know the Types and Functions

A server is a technological device that plays an important role in supporting digital development activities, website access, file storage, and business apps.

This device supports all access to a website, file storage, to running daily business applications.

Do you understand this device? This article will explore more about servers, including their definition, how they work, their functions, and types.

What is a Server?

A server is an electronic device that serves as a digital service centre to other computer devices connected through a network, usually called clients. The services provided by this device are resources, ranging from data and applications to internet connections.

In providing these services, the equipment works 24 hours a day to handle the requests of many clients simultaneously. Therefore, to fulfil its duties, this device is equipped with high technical specifications.

Without this device, various aspects of technology use, such as website storage, email, and other data, would not be able to be accessed properly.

How Does it Work?

The way a server works is to fulfil client requests and respond by providing the requested data or service. Here’s how it works in detail:

• Client request: The client sends a request to the device to access a service or data.
• Request processing: The device receives the client’s request and then processes the request by searching for data, running applications, or performing other operations.
• Response delivery: After responding to the request, the device will send a response containing the data or service requested by the client.
• Completion: The client receives the response from the device and uses the service provided.

Knowing The Types

According to their function, these devices are divided into several types. Here are some types of devices, according to their function, that are commonly used:

1. Web server

A web server is a type of device that functions to store and serve web content to clients through a browser. User requests will be sent to the server through a predetermined communication protocol. Using a web server will help affect the performance of your website.

The Functions

The web server has several functions, from storing and delivering content to providing database access. Here are some of its functions:

• Storing and delivering content: Stores various files that make up a website, such as HTML files, CSS, JavaScript, images, and others.
• Handles HTTP/HTTPS requests: Processes requests from browsers using the HTTP/HTTPS protocol.
• Provides database access: Provides dynamic content or stores data required by the web application.

The Advantages

• Increased access speed and traffic management: Efficient caching and resource allocation optimize page loading speeds and keep the website stable during traffic surges.
• Flexible scalability: The server can be easily scaled up to accommodate growing web traffic without compromising responsiveness.
• Multi-language support: Supports various backend programming languages, including PHP, Python, Ruby, and Node.js.

2. Database server 

A database server is a type of device that functions to store, manage, and provide data access. This device makes it easier to find your data because the server provides organized big data services.

The Functions

The database server has several functions, from Structured data storage to access control and security. Here are some of its functions:

The Functions

• Structured data storage: Stores large volumes of data in an organized structure for fast retrieval.
• Data integrity and management: Ensures data consistency and handles complex query processing efficiently.
• Access control and security: Enforces authorization rules and restrictions to protect database entries.

The Advantages

• Centralized management and integration: Simplifies data administration and integrates seamlessly with various enterprise software platforms.
• Data backup and recovery: Built-in recovery mechanisms minimize the risk of data loss caused by hardware failures or system crashes.

3. Mail server 

A mail server is a type of device that functions to manage sending, receiving, and storing emails. The server will ensure that emails between users are sent and received safely. With its ability to send more marketing emails at once to recipients, this device is often used by businesspeople.

The Functions

The mail server has several functions, from sending emails to filtering spam and viruses. Here are some of its functions:

• Sending emails: With the Simple Mail Transfer Protocol (SMTP), it sends emails from the sender to the recipient’s server. 
• Receiving emails: Receives incoming emails and stores them before distributing them to recipients.
• Filtering spam and viruses: Filters incoming emails, detecting and discarding spam or virus-containing emails before they reach the user’s inbox.

The Advantages

• Professional domain branding: Allows organizations to use custom domain names in email addresses, enhancing business credibility.
• Customizable control and storage: Offers full administrative control over mailbox storage capacity and system integration.
• Enhanced privacy and protection: Provides end-to-end encryption and custom security policies to safeguard sensitive internal communications.

4. File server 

A file server is a type of device that functions to provide storage and file-sharing services in a network. As the heart of a fast and precise computer network, the server is equipped with a high-capacity hard disk and RAM. This device is often used in schools, offices, and internet cafes.

The Functions

The file server has several functions, from centralized data storage to easy data access. Here are some of its functions:

• Centralized data storage: Users can access data from the same location, as various file types such as documents, images, and videos are stored centrally.
• Efficient file sharing: The centralized data source allows users to share files efficiently.
• Easy data access: Users can access files on the server as long as the device is connected to the network without the need to manually copy data.

The Advantages

• Remote access flexibility: Enables authorized users to access files securely from any location over the network.
• Centralized maintenance & backup: Streamlines data maintenance, making backup and disaster recovery processes faster and less resource-intensive.
• Granular access control: Administrators can set strict user permissions to prevent unauthorized access and data leaks.

5. Application server 

An application server is a type of device that functions to run various applications that can be accessed by many users on one network. In a business environment, this server is often used for enterprise applications such as transaction applications, messaging services, and others.

The Functions

The application server has several functions, from processing requests to managing user sessions. Here are some of its functions:

• Processing requests: Receive client requests from web browsers or mobile applications and send appropriate responses.
• Data management: Retrieve, store, and update data from databases or other data storage systems.
• Managing user sessions: Ensure application resources are accessible and connected to logged-in users.

The Advantages 

• Optimized execution performance: Provides a stable runtime environment that accelerates application code execution and transaction processing.
• Data access abstraction: Offers an abstraction layer that simplifies database integration and allows database updates without rewriting application logic.
• Scalable traffic handling: Efficiently manages simultaneous client requests to maintain application stability during peak usage.

Physical Server and Virtual Server

When deploying server infrastructure, organizations choose between physical (bare-metal) hardware and virtualized environments:

When deploying server infrastructure, organizations choose between physical (bare-metal) hardware and virtualized environments:

Physical Server 

A physical server is a type of server in the form of hardware such as a motherboard, CPU, memory, and storage, as well as an operating system that manages these resources.

The device stands alone in performing its operations. Usually, physical servers are used by large companies to have the capacity and full control of the operating system.

• Best For: High-performance workloads requiring full access to hardware resources, maximum security, and dedicated processing power.
• Key Trade-off: Higher upfront hardware costs, manual hardware scaling, and potential resource underutilization.

Virtual Server

A virtual server is a type of server that is the result of virtualization technology. Multiple virtual servers can simultaneously run on a single physical device. Because it does not require multiple physical devices to run multiple services, virtual servers are more efficient in space, cost, and maintenance.

• Best For: Flexible, cost-effective operations requiring rapid server deployment, easy scaling, and efficient resource allocation.
• Key Trade-off: Slight performance overhead due to the hypervisor abstraction layer.