Building Extensions to Access Points

At times, it may be necessary to increase the coverage area for your WLAN.
When you design your network, you can enhance your secure coverage areas by adding extension points that increase range to specific areas where
employees will roam within the confines of your company grounds. The idea
is to have each extension point extend wireless network range by relaying
transmissions from one access point to another extension point. Extensions
can be grouped together to send transmission packets from an access point
to clients who are in other areas of your organization. The only problem is
knowing where not to put an extension point within your organization. If
you add extension points in areas that broadcast your signal into any public
area, street, or residential area—you are literally inviting a hacker to take
advantage of your enhanced signal strength to break into your network or
eavesdrop on your confidential network transmissions.