What Is VPN?

Why use VPN?

Every device on the internet has a public IP address which is used to identify and connect to that device either using a browser, command line or any other method. To connect with the device, the data is sent over the internet. This data contains information such as IP addresses etc. which can be intercepted if it is sent over an unsecured network. To protect identity, privacy and data transferred over the internet, VPNs are used to make private connection between the two device/networks.

How does VPN work?

When you use VPN over the internet, it creates a private and encrypted tunnel between the two devices/networks. Now as a VPN it is much harder to do eavesdrop on your data and even if it is intruded upon, as this is data is encrypted, it is close to impossible to get any information from this encrypted data. There are several VPN tunnelling protocols such as PPTP (Point-to-Point Tunnelling Protocol), L2TP (Layer Two Tunnelling Protocol), IPSec (Internet Protocol Security), SSL (Secure Sockets Layer) etc which are used to created VPN tunnels.

Original Source:

https://www.alibabacloud.com/knowledge/what-is-vpn

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