http://www.ehow.com/guide_5-http://www.ehow.com/guide_5-computers.html.htmlwww.ehow.comhttp://www.ehow.com/how_4465631_wep-keys-wireless-routers.htmlWEP keys are security precautions for wireless networks, get a lesson in wireless networks and routers in this free video. Published on 7/30/2008http://www.ehow.com/tips_4465631.htmlwhere the guy refers to hexadecimal as being 0-9, a-j ... this is completely wrong as you can demonstrate by counting on your 10 fingers ... hexadecimal is base16 if you count through ?j? as he suggests you?re in base20. Computer systems and networks use binary (base2), octal (base8), and hexadecimal (base16). Nothing uses base20.