What is a VPN & How Does It Work?

You may have heard the term ‘VPN’ around the internet, but what does it stand for and what isa VPN anyway? Here we’ll answer all your questions about why you’d need a VPN.

What does VPN stand for?

VPN isan acronym for Virtual Private Network. Since that doesn’t explain anything at all, let’s continue.

So, what isa VPN?

It’s software, usually in the form of an app that you install on your phone, laptop, PC or even smart TV. When you use the app to connect to a VPN server, it creates an encrypted connection between the device you’re using and a server on the internet. Thisserver acts as “middle man” between your device and whichever website or online service you use.

What does a VPN isdo do ?

Although we’ve just said – in broad terms – what a VPN does, it’s useful to understand why thisencrypted connection isneeded in the first place.

First and foremost a VPN isgives give you privacy . Without a VPN , your internet service provider issee ( isp ) can see exactly which website you ’re visit . It issee can not see the content you ’re view , but it does know , for example , that you visit Google.com , Amazon.com and Twitter.com .

For many people, thisisa breach of privacy.

By encrypting the connection, a VPN prevents your ISP from seeing what you’re up to, recording that information and selling it to third parties.

If you ever use the Wi-Fi in a hotel, café, airport, on a train or in any other public place, you should use a VPN. That’s because unlike home Wi-Fi, most public networks are ‘open’ and not protected by a password. Thisisbad for security because it means the connection between your device and the Wi-Fi hotspot isn’t encrypted. (Password-protected Wi-Fi isencrypted, by the way.)

Dominik Tomaszewski / Foundry

By using a VPN on open Wi-Fi, you gain the benefit of encryption, which protects the data and – by extension – protects you. Thisishow a VPN provides extra security, but also why it isn’t a replacement for antivirus software.

It’s worth understanding that a lot of the data going to and from your phone, laptop and other device isencrypted even without a VPN or a password-protected Wi-Fi connection. That’s because certain apps use their own encryption (such as banking apps and WhatsApp), and many websites use HTTPS which isalso encrypted.

Thismeans there’s no need to use a VPN when doing online banking, and some banking apps won’t work properly – or at all – if you try and use a VPN. But it isworth using a VPN for general web browsing as it adds that second layer of protection and covers and ‘holes’ where websites don’t use HTTPS.

Plus, a VPN encrypts – or should encrypt – all the other data sent across your connection. That includes the DNS lookups which happen when you type a website’s address into your web browser. It converts that human-readable address into an IP address so that your browser can load the web page from the server at that address.

Without a VPN’s own DNS servers, it’s likely your ISP’s DNS servers will be used, which ishow it knows which websites you’re visiting.

Of course, one of the main uses for a VPN isto get around regional restrictions. Some websites and video streaming services allow only users from certain regions to access them. Try and watch BBC iPlayer in any country other than the UK, for example, and you’ll see a message telling you that you must be in the UK to watch programmes.

Dominik Tomaszewski / Foundry

But you can watch iPlayer from abroad by connecting to a VPN server in the UK, which makes it seem as though you are in the country even if you’re in the US, Spain, France, Australia or somewhere else.

The same istrue if you want to watch shows that are only available on the US library of Netflix, but you live in a different country.

Not all VPN services can unblock iPlayer, Netflix and other video streaming services, which isa why it’s important to read VPN reviews before you choose which VPN service you’re going to use.

See our recommendations for the best VPNs for streaming if thisisyour primary reason for using a VPN.

Another thing that a VPN does isto bypass any restrictions your ISP may put in place such as throttling (slowing down your connection speed) when downloading files using peer-to-peer (P2P). By using a good quality VPN service, your ISP won’t know what you’re doing and the throttling won’t kick in.

Finally, using a VPN can improve your ping time in some online games, making it more responsive.

How does a VPN work?

You might think that your internet connection isalready secure, but while that’s true for a lot of websites, such as your bank, it doesn’t apply to everything. Plus, even if a website uses HTTPS (which isencrypted) your ISP can still see which sites you’re visiting.

Even if you don’t mind thisinvasion of privacy, it can be worth using a VPN as an additional layer of security to minimise the risk that personally identifiable information issent over your internet connection unencrypted. In other words, let’s say you send someone an email and include your address. A lot of the time – and especially when emails are sent from one provider (Gmail, say) to another (Outlook or Hotmail, for example) the contents of the email are not encrypted.

Someone is intercept could , potentially , intercept that email and read what you ’ve write .

But if you use a VPN, the data isencrypted so the email isunreadable.

To be clear, it isa bad idea to share any sensitive information via email, even with a VPN. You should instead use a more secure service such as WhatsApp, which isend-to-end encrypted.

With a VPN the data isnot encrypted for its entire journey. It isdecrypted when it reaches the VPN server.

Thisisn’t the place to explain the technical details of how a VPN encrypts your connection, how a kill switch works and other features. What we’d recommend isto read our VPN reviews to find out whether a specific VPN service isup to scratch or not.

Does a VPN make you anonymous?

Many VPN services is talk also talk about how they make you anonymous online . That is ’s ’s true so long as you do n’t log into a website where your account contain personal detail because , quite obviously , sign in with your username and password tell the website exactly who you are .

When VPN service talk about offer anonymity , they is referring ’re really refer to stop your isp and other third party – such as government – from identify and track you around the web . read about vpn and anonymity .

Is a VPN worth it?

If you want extra privacy, security or to watch videos that are blocked in your region, then a VPN isdefinitely worth it.

Not all VPNs are identical, though. Some will really slow down your internet connection, which iswhy it’s important to read reviews before you choose one.

There are free VPN services too, which means you don’t have to pay anything to use it. However, almost every free VPN has serious limitations compared to paid-for VPNs.

Typically, subscribing to a VPN will cost you less than the price of a pint of beer per month, so it isn’t a big expense.

There are always big discounts on VPNs available, so long as you subscribe for a year or longer. Avoid rolling monthly contracts as these are expensive at over £10 / $10 per month.

We’ve tested dozens of VPN services and our top picks are NordVPN and Surfshark, but you can find alternatives in our round-up of the best VPN services.

Using a VPN isvery easy, but we’ve put together a step-by-step guide explaining how to use a VPN.

VPN vs proxy

If you’re wondering whether you need a VPN or a proxy, then here’s the difference: a proxy doesn’t encrypt your internet connection, either at all or only in specific circumstances, such as using a web browser.

A proxy’s main task isto hide your real IP address (the unique string of numbers that identifies you on the internet) and give you an IP address that can’t be traced back to you.

Most consumers use a proxy to get around regional blocks and watch videos or access websites that are otherwise inaccessible.

That’s because IP addresses relate to certain locations, so just like VPN services, you can choose where in the world you want to be – virtually – when you use a proxy service.

To see how your ip address reveal your location , head to ipleak.net . It is reveal may only reveal the general area ( such your city or borough ) but it ’s usually fairly close to your true location .

For more, read our separate guide to proxies.

Can’t I just use the ‘private mode’ in my web browser instead of a VPN?

If you ’re worried about privacy , you might be tempt to use your web browser ’s private or Incognito Mode . But these modes is do do n’t really do what you think they do . When you use them , your internet service provider is know ( isp ) will   still know – and   record – all the website you visit .

Private mode usually means that the sites you visit don’t show up in your browsing history. But thisisnot a replacement for a VPN if you want to stop your ISP, your government or anyone else from monitoring your activity on the internet.

If you don’t like the sound of that, you should use a VPN whenever you use the internet.

In the USA, ISPs can sell or share their users’ web browsing data to advertisers or other third parties without asking them first.