Detailed Explanation with Core 2 References:The ipconfig command displays the IP address, subnet mask, and default gateway for all network adapters in a Windows computer. This output specifically shows details about an Ethernet adapter, which is directly tied to ipconfig. According to Core 2, understanding command- line tools like ipconfig is essential for network troubleshooting (Core 2 Objective 1.2).

A checksum is a cryptographic hash function (like MD5 or SHA-256) used to verify the integrity of files.
When downloading files from the internet, websites often provide the checksum value of the file so that users can ensure the file was not altered during download or corrupted. The user can generate the checksum on their local system and compare it to the one provided by the site. If they match, the file is intact and safe to use.
Other options like BitLocker or FileVault are encryption tools, and a password manager is irrelevant to file verification.
References:
CompTIA A+ 220-1102 Domain 3.5: File Integrity Checking (CompTIA) (ProfMesser)

The best explanation for why the system still has malware after performing a System Restore is that the malware was installed before the system restore point was created. A system restore point is a snapshot of the system settings and configuration at a certain point in time. A System Restore is a feature that allows users to restore their system to a previous state in case of problems or errors. However, a System Restore does not affect personal files or folders, and it may not remove malware that was already present on the system before the restore point was created. A system patch disabling the antivirus protection and host firewall may increase the risk of malware infection, but it does not explain why the malware persists after a System Restore. The system updates not including the latest anti-malware definitions may reduce the effectiveness of malware detection and removal, but it does not explain why the malware persists after a System Restore. The system restore process being compromised by the malware may prevent a successful System Restore, but it does not explain why the malware persists after a System Restore. References: CompTIA A+ Core 2 (220-1002) Certification Exam Objectives Version 4.0, Domain 1.3

The symptoms that the user's Windows computer is experiencing suggest that the new software program that the user installed from an external website may be malicious or incompatible with the system. The program may be consuming a lot of CPU resources, slowing down the performance of other programs and files. The program may also be altering the browser settings or the HOSTS file, causing the web redirection to an unauthorized site. The first step that the technician should do is to uninstall the new program from the Control Panel or the Settings app, and then restart the computer. This may resolve the issue and restore the normal functionality of the computer. If the problem persists, the technician may need to perform additional steps, such as scanning for malware, checking the HOSTS file, clearing the web browser cache, or restoring from a previous backup

RADIUS (Remote Authentication Dial-In User Service) (Option B) is a network protocol that allows users to authenticate using their network credentials, such as usernames and passwords, typically stored in a central directory like Active Directory. It ensures that users can log in to the Wi-Fi using their existing network credentials.
* AES (Option A) is an encryption standard but does not handle authentication.
* TKIP (Option C) is a deprecated encryption protocol and not related to network login management.
* WPA3 (Option D) is the latest Wi-Fi security standard but does not specifically handle centralized login management like RADIUS does.
CompTIA A+ Core 2 References:
* 2.2 - Compare and contrast wireless security protocols and authentication methods, including RADIUS.