Here are some common VPN terms you may come across and what they mean.
ISP – Your Internet Service Provider (ISP) is the company you pay for access to the internet. Big UK ISPs include the likes of SKY, BT, Plusnet and TalkTalk.
Server – A machine (physical or virtual) that serves a computer (your laptop or smartphone) with the resources, data, services, or programs they ask for.
Tunnelling – The process of creating a secure and private channel of communication between a user (you) and a website or service.
Split-tunnelling – The ability to send data from different apps to different servers through separate tunnels. For example, you might use one tunnel for your web browser and another for your Netflix app.
Logs – In VPN parlance, a log is a record of your online activity. Every VPN in our best VPNs for 2022 list has a strict no-log policy, which means they don’t keep records of how you use them and therefore can’t be ordered to hand them over to anyone else.
Encryption – The process of translating information into code that can’t be deciphered without the correct encryption keys.
Megabits per second (Mbps) – Units used to measure download and upload speeds. Megabits per second is an expression of the amount of digital data transferred from one terminal to another in one second.
DNS – DNS stands for Domain Name Servers. A DNS translates a web address like forbes.com into a string of numbers. When you type a web address into your web browser, you make a request to a DNS and it returns the corresponding string of numbers your web browser needs to visit the website.
DNS leak – When you use a VPN, DNS requests as described above should be encrypted and sent through a ‘tunnel’. It’s possible that this information can ‘leak’ from the tunnel if your VPN doesn’t properly protect you or was misconfigured, exposing details of the website you visit to your ISP and other third parties.
Protocol – A protocol is way of doing things. A VPN protocol is a set of rules that determine how a VPN application connects to a server. Some protocols offer faster download speeds than others, while others are more secure or offer a balance between speed and security.
Kill switch – A VPN kill switch automatically disconnects you from the internet in the event your VPN connection is lost. This protects you from temporarily exposing unencrypted data.
Double VPN – Some VPN services allow you to connect from your computer to another server via a server in the middle as an additional layer of security. For example, you might connect to a server in Germany and then connect to a server in Canada via that German server.