VPN in Computer Networks (Full Explanation)
What is a VPN in Computer Networks?
VPN, which stands for Virtual Private Network, enables you to link your computer to a private network, establishing an encrypted connection that conceals your IP address. This allows for secure data sharing and web browsing, safeguarding your online identity.
A virtual private network, or VPN, creates an encrypted link over the Internet from a device to a network. This secure connection ensures that sensitive information is transmitted safely. It prevents unauthorized individuals from intercepting the traffic and allows users to work remotely. VPN technology is extensively utilized in corporate settings.
VPN Connection Diagram
The diagram below illustrates a VPN connection.
In this illustration, Routers R1 and R2 employ VPN technology to ensure the organization's privacy.
Uses of VPN Connections
VPN connections serve two significant purposes:
1. To create WAN connections using VPN technology between two remote networks that may be separated by thousands of miles, yet each has some means of internet access.
2. To facilitate remote access connections that allow remote users to connect to a private network via a public network like the internet.
Types of VPNs
The various types of VPNs include:
1. Router VPN
The first type involves a router equipped with VPN capabilities. A VPN router can perform standard functions while also being configured to establish VPNs over the internet to other similar routers in distant networks.
2. Firewall VPN
The second type is integrated into a firewall device. Firewall VPNs can support remote users and provide VPN connections.
3. Network Operating System
The third category includes VPNs that are part of a network operating system, such as Windows NT, Windows 2000, and Netware 5. These VPNs are typically used for remote access and are generally the most cost-effective to acquire and set up.
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