The first attack made against your communications network will most likely be a wardialing attack. In a wardialing attack, the attacker will dial telephone numbers and listen for the unmistakable answer of a computer. Nothing can stop a patient and determined attacker from eventually discovering a telephone number connected to your network. Your best defense is to properly secure all the lines that connect to your network.
Once an active connection has been found through wardialing, the attacker will attempt to collect information about the system using banner-grabbing techniques and then proceed through all the common login/password attacks.
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Read how to maintain and repair any desktop and laptop computer. This Ebook has articles with photos and videos that show detailed step by step pc repair and maintenance procedures. There are many links to online videos that explain how you can build, maintain, speed up, clean, and repair your computer yourself. Put the money that you were going to pay the PC Tech in your own pocket.