The process of documenting who had possession of evidence at every step of the process is called chain of custody

Malware is software that infects computer systems to damage, disable or exploit the computer or network for various malicious purposes5. Malware is typically distributed via email attachments, fake internet ads, infected applications or websites, and often relies on user interaction to execute6. Therefore, one of the most effective ways to prevent malware infections is to educate the end user about the common signs and sources of malware, and how to avoid them7. Configuring the firewall, restoring the system from backups, and updating the antivirus program are also important security measures, but they do not address the root cause of the user's repeated infections, which is likely due to a lack of awareness or caution.
References5: Malware: what it is, how it works, and how to stop it - Norton6: How to Prevent Malware: 15 Best Practices for Malware Prevention7: 10 Security Tips for How to Prevent Malware Infections - Netwrix

One of the key environmental benefits of using virtualization is the reduction in physical space requirements.
Virtualization allows multiple virtual machines to run on a single physical server, reducing the need for multiple physical servers. This consolidation leads to fewer physical machines, saving space in data centers and reducing the overall physical footprint.
* A. Greater energy consumption is incorrect as virtualization typically leads to reduced energy consumption due to the consolidation of hardware.
* B. Noise pollution can be reduced because fewer physical machines often mean less overall noise.
* D. Fewer maintenance needs is a possible benefit but not directly related to environmental effects like reduced space requirements.
References:
* CompTIA A+ Core 2 (220-1102) Exam Objectives, Section 4.5: Summarizing environmental impacts and local environmental controls, including the benefits of virtualization.

A possible cause of the user being redirected to unexpected websites is that the localhost file entries have been modified by malware or hackers to point to malicious or unwanted websites. The localhost file is a text file that maps hostnames to IP addresses and can override DNS settings. By examining the localhost file entries, a technician can identify and remove any suspicious or unauthorized entries that may cause the redirection issue. Enabling firewall ACLs may not resolve the issue if the firewall rules do not block the malicious or unwanted websites. Verifying the routing tables may not resolve the issue if the routing configuration is correct and does not affect the web traffic. Updating the antivirus definitions may help prevent future infections but may not remove the existing malware or changes to the localhost file. References: CompTIA A+ Core 2 (220-1002) Certification Exam Objectives Version 4.0, Domain 1.3

When a technician is unable to connect to a laptop over a VPN, one of the most common reasons is that the firewall settings on either the laptop or the network are blocking the connection.
* Wireless protocol: Unrelated, as the technician is already connected to the VPN.
* DHCP pool: Unlikely to be the issue, as it deals with IP address assignment.
* Content filtering: Typically involves filtering web content, not affecting direct connections.
* Firewall: The correct setting to review, as it may block the necessary ports or services required for remote access.
Reference: CompTIA A+ Exam Objectives [220-1102] - 2.3: Given a scenario, troubleshoot common wired and wireless network problems.