Certainly! Let’s analyze the situation and determine which network defense approach Alice employed on her laptop.

Biometric Authentication:

Biometric authentication uses unique physical or behavioral characteristics (such as fingerprints, iris scans, or voice recognition) to verify a user’s identity.

It enhances security by ensuring that only authorized individuals can access a system or device.

Network Defense Approaches:

Let’s match Alice’s situation with the available approaches:

Reactive Approach:

Reactive approaches focus on responding to incidents after they occur.

They involve actions like incident response, patching vulnerabilities, and recovering from attacks.

In Alice’s case, she proactively secured her laptop before any incident occurred, so this approach doesn’t apply.

Proactive Approach:

Proactive approaches aim to prevent incidents before they happen.

They involve measures like risk assessment, vulnerability scanning, and security awareness training.

Alice’s use of biometric authentication aligns with a proactive approach because it prevents unauthorized access upfront.

Preventive Approach:

Preventive approaches focus on stopping incidents from occurring.

They include measures like access controls, firewalls, encryption, and security policies.

Alice’s biometric authentication is a preventive measure.

Retrospective Approach:

Retrospective approaches involve analyzing past incidents to learn and improve.

They are not directly related to Alice’s situation.

Alice employed the Preventive Approach by using biometric authentication to secure her laptop against unauthorized access.