Alice was working on her major project; she saved all her confidential files and locked her laptop. Bob wanted to access Alice's laptop for his…

The network defense approach that was employed by Alice on her laptop was the preventive

approach. The preventive approach aims to stop or deter potential attacks before they happen by

implementing security measures that reduce the attack surface and increase the difficulty of

exploitation. Biometric authentication is an example of a preventive measure that uses a physical

characteristic, such as a fingerprint, iris, or face, to verify the identity of the user and grant access to

the device or system. Biometric authentication is more secure than traditional methods, such as

passwords or PINs, because it is harder to forge, guess, or steal. By locking her laptop and using

biometric authentication, Alice prevented Bob from accessing her laptop and her confidential files

without her permission. Reference:

Network Defense Essentials Courseware, EC-Council, 2020, pp. 1-7 to 1-8

What is Biometric Authentication?, Norton, July 29, 2020

An introduction to network defense basics, Enable Sysadmin, November 26, 2019