If You Have a LAN
If your computer is connected to others through a LAN, follow the suggestions from the list in the preceding section. Make the Security Policy changes on each computer.
In addition, if you use a wireless network, you must use encryption to protect your network. Otherwise, thanks to passwordless file sharing, random people passing by could have the same access to your shared files as you do. Use WPA2 encryption if all of your computers and routers support it; otherwise, see whether you can use WPA. Use WEP only if you have devices that don’t support WPA.
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