Understanding VPNs

Understanding VPNs

They seem to be doing very many things.

Here is Microsofts take on what VPNs are and how they work

How are VPNs different from https

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More confusion and small clarity: an SOF discussion


https - at the application level
VPN - at the OS network layer level

baa hambug, so....

High level VPN uses from lifewire

Remote worker - an employee talks to a VPN server over internet first. All traffic goes through encrypted through that server first and any application on that client computer can behave as if it is on the internal network. I suppose in that case the VPN client on the client computer should correctly work ip address resolution! wonder how the computer OS on the client distinguishes between public IP and the private ip?

Public wifi hotspots: Consumers can go through a VPN server to browse the internet. I wonder then the traffic always goes through the VPN server!! is that a proxy then??

Two networks: that are connected through VPN. This makes sense as the two networks understand each other ips. then how do they talk to the public internet?

How does VPN client talk to public internet and the private network?

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Understanding tunneling an article

You pass routing information (ip and port) and data encapsulated in an ip packet and send to the target server VPN

The vpn target server will unpack and acts like a proxy on the remote network

SSH is one such tunneling protocol

For instance SSH can simulate a remote port like a local port as long as, I assume, the remote server SSH counter part allows it based on the credentials submitted

Why does VPN uses so many different protocols?

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1. When does a VPN use tunneling vs non-tunneling protocols?

2. In a non tunneled VPN how does the client distinguish public and private ip addresses?

3. How do public and private ip addresses coexist at the same time?

Once a client joins a VPN does all traffic goes to the VPN server?

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