diff --git a/defences.tex b/defences.tex
index 899de81..f786fdf 100644
--- a/defences.tex
+++ b/defences.tex
@@ -346,3 +346,10 @@ Additionally, they are limited to the current \gls{URL} bar domain.
 
 \subsection{Virtual Private Networks}
 \label{subsec:virtual private networks}
+
+\glspl{VPN} are designed to extend the local network to include a private
+network hosted by a \gls{VPN} provider. This allows traffic from the user to be
+tunneled through the \gls{VPN}'s network before reaching its destination,
+appearing to be coming from the \gls{VPN} provider's \gls{IP} address.
+
+