Internet Protocol Security (IPsec) was initially developed by the Internet Engineering Task Force (IETF) for IPv6, which was required in all standards-compliant implementations of IPv6 before RFC 6434 made it only a recommendation.[7] This standards-based security protocol is also widely used with IPv4 and the Layer 2 Tunneling Protocol. Its design meets most security goals: authentication, integrity, and confidentiality. IPsec uses encryption, encapsulating an IP packet inside an IPsec packet. De-encapsulation happens at the end of the tunnel, where the original IP packet is decrypted and forwarded to its intended destination.
Using a VPN, all data traffic is confined to a private, encrypted tunnel until they reach the public Internet. Destinations cannot be accessed until after the end of the VPN tunnel is reached. VPN services are quite useful in workplaces, especially for those who use mobile devices in accessing data from a work server. However, the most common use of VPN software is to remain anonymous to ISPs, websites or governments. This is true for users who download files illegally, such as in the case of copyrighted torrent files.
It’s also a great way to enjoy unlimited streaming and outstanding security without committing to an expensive plan. After all, if you want to understand why people love VPNs without paying, you shouldn’t use a slow, spammy, free program. Instead, try a great service like ExpressVPN or NordVPN for free. If you love it as much as these real users did, keep it – and if not, cancelling your trial is easy.
Don't mistake the cartoony layout of the TunnelBear VPN Android app — it's a simple-to-use app that offers serious VPN protection. You can create an account for free, which gives you 500MB of secure data a month but we'd recommend checking out a paid subscription that lets you connect up to five different devices at a time to servers in 20 different countries.
When it comes to servers, more is always better. More servers mean that you're less likely to be shunted into a VPN server that is already filled to the brim with other users. NordVPN, Private Internet Access, and TorGuard currently lead the pack with well over 3,000 servers each—NordVPN is at the forefront with 5,130 servers. But the competition is beginning to heat up. Last year, only a handful of companies offered more than 500 servers, now it's becoming unusual to find a company offering fewer than 1,000 servers.

Before you decide which best home VPN network client you want to download and install on your device, take some time to ask yourself a few questions, the most important of them being “what exactly do you need the VPN for?” For example, do you want a VPN for your Windows computer? Regardless of the platform or firmware that your devices operate on, certain aspects of a VPN are critical and should be considered before making the purchase. Regardless of why you need a VPN, unlimited access to all the Internet has to offer is of top importance when making your decision. With a VPN like Express VPN or NordVPN, you will be able to surf securely and privately. There are a number of features you might want from a VPN - unlimited number of devices, fast surfing speeds, Android and iOS apps, major VPN protocols. All are important in choosing the right VPN for you. Check out our guide to choosing the right unlimited VPN for your needs to help you decide which of the best VPNs in 2018 is right for you. 

Every service we tested accepts payment via credit card, PayPal, and Bitcoin. That’s plenty of options for most people, and you can always use a prepaid debit card if you don’t want your billing information tied to your VPN account. IVPN and OVPN are the only ones to accept cash payment through the mail, if you really don’t want to make a payment online. Private Internet Access and TorGuard accept gift cards from other companies—IVPN doesn’t, but that option isn’t worth the additional hassle for many people when other secure, private methods are available.
It is possible for some background services to send information across that initial, unsecured connection before the VPN loads. To be fair, the risk is relatively minor for most usage profiles. If you're establishing a connection automatically to your corporate server, you will definitely want to check with your IT team about how they want you to set things up.
It's also notable that ExpressVPN is able to gain access to Netflix, which some (like PureVPN) are not able to do. Like PureVPN, ExpressVPN is one of the best for getting around roadblocks in China (though there are only servers in 94 countries), and has up to 256 bit encryption. Get one month for $12.95, six months for $9.99/month, or a one-year subscription for $8.32/month. You would be paying around $10 more per month compared to any other VPN, but the quality is definitely there — and if you're really not happy, you can get your money back within the first 30 days. Another cool thing: You can pay with Bitcoin.
Not all VPN services require that you pay. There are, in fact, many excellent free VPNs. But all of the free VPNs we've tested have some kind of limitation. Some limit you to just a few simultaneous connections or devices on an account. Others restrict you to a few hundred MBs of data per day or per month. Others limit you to just a handful of servers. Still others do all of the above.
This is important to understand. Consumer VPN services protect your transmission from your location to their location, not from your location all the way to the destination application you're using. If you think about it, this makes sense: A consumer VPN service is operated by a completely different company than, for example, Facebook or your bank.

For example, when your computer is connected to a VPN, the computer acts as if it's also on the same network as the VPN. All of your online traffic is transferred over a secure connection to the VPN. The computer will then behave as if it's on that network, allowing you to securely gain access to local network resources. Regardless of your location, you'll be given permission to use the internet as if you were present at the VPN's location. This can be extremely beneficial for individuals using a public Wi-Fi.
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