What advantage does a reliable web page have over published textbooks and encyclopedias?

It may be the fact that you can update it. While books may be outdated and wrong.

It is easily updated with the most recent info 

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As computers and other digital devices have become essential to business and commerce, they have also increasingly become a target for attacks. in order for a company or an individual to use a computing device with confidence, they must first be assured that the device is not compromised in any way and that all communications will be secure