VPN Explained
VPN encryption explained simply: a VPN creates an encrypted connection between your device and a VPN server.
This guide explains VPN encryption, IP addresses, VPN servers and secure tunnels without unnecessary technical jargon. It also explains something equally important: what a VPN does not protect you from.
VPN Encryption Explained
When you connect to a VPN, your device creates an encrypted tunnel to a VPN server. Your internet traffic travels through this protected connection before continuing to its destination.
Websites and online services will normally see the IP address of the VPN server rather than the public IP address of the connection you are using. This can provide additional privacy, particularly when connecting through networks you do not own or control.
A VPN can also be useful when travelling, working remotely or using public Wi-Fi. If you regularly connect to unfamiliar networks, read our VPN on Public Wi-Fi guide for more information.
What Happens When You Connect to a VPN?
Without a VPN, your device normally sends internet traffic through the network you are currently using. That may be your home broadband, mobile provider, workplace connection or a public hotspot. The public IP address associated with that connection is normally visible to the websites and online services you contact.
When a VPN is active, the protected part of the connection is sent to the VPN server first. The server then forwards traffic towards its destination. This is why a VPN can both encrypt the connection to the server and change the public IP address normally presented to websites.
Does a VPN Make You Anonymous?
No. A VPN can improve privacy, but it does not make you invisible. Websites can still recognise you when you sign into an account, and cookies or other tracking methods can still identify a browser or device.
Applications can also collect information according to the permissions you have granted them. For a closer look at that distinction, read what a VPN can and cannot stop from tracking you.
VPN Encryption and DNS Protection Do Different Jobs
VPN encryption protects traffic travelling between your device and the VPN server. DNS filtering works differently: it can prevent many unwanted or known malicious domains from resolving in the first place.
SV London UK can combine WireGuard VPN connectivity with AdGuard Home filtering and Quad9 threat-protected DNS. Our VPN with ad blocking guide explains how these layers complement one another.
What a VPN Doesn’t Protect You From
A VPN improves the privacy and security of your internet connection, but it does not protect you from every online threat.
It cannot stop you from visiting a malicious website, downloading infected files or giving personal information to a fraudulent service. You should still use strong passwords, keep your devices and software updated and remain cautious about suspicious links, emails and downloads.
A VPN is best viewed as one important layer of online security. It protects the connection between your device and the VPN server, while other security measures help protect your device, accounts and personal information.
When Is a VPN Useful?
A VPN can be useful whenever you want additional privacy and protection for your internet connection. This includes using public Wi-Fi, working away from home, accessing services while travelling or connecting devices through networks you do not fully control.
SV London UK provides encrypted VPN protection for phones, tablets and laptops from £5.50 per month or £50 per year. View our Personal VPN Service for more information.
For additional independent advice about staying secure online, visit the UK National Cyber Security Centre (NCSC).
Keep It Locked. Stay Protected.
