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What is VPN? How It Works, Types of VPN

A VPN, or virtual private network, is a service that allows you to connect to the internet securely and privately. A VPN encrypts your data and routes it through a server in another location, making it appear as if you are browsing from that location. This can help you access geo-restricted content, protect your online privacy, and avoid censorship and surveillance.
Cyber Security Vikash
Aug 11, 2023 01:16 PM
What is VPN?, How It Works, Types of VPN, VPN, virtual private network
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A VPN, or virtual private network, is a technology that creates a secure and encrypted connection between your device and a server on the internet. A VPN allows you to access online services and websites that may be blocked or restricted in your country or region, or to protect your privacy and security when using public Wi-Fi networks.

How does a VPN work?

When you connect to a VPN, your device sends and receives data through an encrypted tunnel that connects you to the VPN server. The VPN server then acts as an intermediary between you and the internet, masking your IP address and location, and routing your traffic to the desired destination. This way, you can bypass geo-restrictions, censorship, and firewalls that may prevent you from accessing certain websites or services. Additionally, a VPN can prevent your internet service provider (ISP), government, hackers, or other third parties from spying on your online activities or stealing your personal information.

Types of VPN

There are different types of VPNs that offer different levels of security, speed, and functionality. Some of the most common types are:

  • PPTP (Point-to-Point Tunneling Protocol): This is one of the oldest and fastest VPN protocols, but also one of the least secure. It is easy to set up and compatible with most devices, but it can be easily blocked or hacked.
  • L2TP/IPsec (Layer 2 Tunneling Protocol/Internet Protocol Security): This is a more secure and reliable VPN protocol than PPTP, but also slower and more complex. It uses two layers of encryption and authentication to ensure data integrity and confidentiality.
  • OpenVPN: This is an open-source and highly customizable VPN protocol that offers a good balance between security and speed. It uses strong encryption and supports various features such as split tunneling, kill switch, and port forwarding. However, it requires additional software installation and configuration on some devices.
  • IKEv2/IPsec (Internet Key Exchange version 2/Internet Protocol Security): This is a modern and robust VPN protocol that offers high security and performance. It is especially suitable for mobile devices as it can quickly reconnect after network interruptions. However, it may not work well with some firewalls or routers.
  • WireGuard: This is a new and innovative VPN protocol that promises to be faster, simpler, and more secure than the existing ones. It uses state-of-the-art cryptography and a lightweight code base to achieve high efficiency and reliability. However, it is still under development and may not be compatible with all platforms or services.


A VPN is a useful tool that can enhance your online experience by allowing you to access blocked or restricted content, protect your privacy and security, and enjoy faster and smoother internet connections. However, not all VPNs are created equal, so you should choose one that suits your needs and preferences. You should also be aware of the potential risks and limitations of using a VPN, such as legal issues, bandwidth caps, logging policies, or compatibility issues.

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