- Dec 26, 2020
Imagine a request from your computer to a server as being a letter in an envelope. Your VPN will take that envelope and stick it inside another envelope, addressed to the VPN end point. The postal service can't see the contents of the letter, nor the address on the inner envelope.So then it sounds like they are not really needed and are just another income stream for companies.
When the envelope reaches the VPN end point, it strips off the outer envelope and sticks the inner envelope in the post, to be delivered to the original destination.
All that takes effort, which takes time, which slows things down a bit.
And the whole thing has to happen on the reverse journey to get the response back to your computer.
It isn't anti-virus. It just makes traffic to and from you pop up in a place other than where it normally would, which would be your ISP.
Free and cheapass VPN providers monitor the traffic before encrypting it, and then flog that data on to aggregators and data pimps who in turn flog it to advertisers.