Posted filed under CompTIA A+.

Authentication : The verification of a person’s identity – Helps protect against unauthorized access.

 

 Broken down into:

1. Something the user knows (password or PIN).
2. Something the user has (a smart card or other security token).
3. Something the user is (biometric reading: fingerprint or retina scan).
4. Something a user does (signature of voice print).

 

 UAC (User Account Control) in Windows 7/Vista requires administrative login to perform higher tasks.

 

Source by wikipedia

 

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