Glossary
VPN terms, defined properly
The answer first, then why it matters, then a tool that lets you see it rather than take our word for it. Several of these terms are widely explained wrongly, and where that is true the page says so.
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Covered elsewhere on the site
These already have a full article, so there is no second page here competing with it.
- Kill switchWhat happens to your traffic when the tunnel drops.
- DNS leakQueries escaping the tunnel while it still says connected.
- WebRTC leakA browser API that reveals your address regardless of proxy settings.
- Split tunnellingSending only some traffic through the tunnel.
- No-logs VPNWhat the claim means and what backs it up.
- Dedicated IPAn address that is yours rather than shared.
Definitions are cheap. Measurements are not.
Every term here has a free tool behind it that shows you the real thing on your own connection — what your address gives away, which resolver is answering for you, whether your browser is leaking around the tunnel.