Dynamic Host Configuration Protocol (DHCP) is a network service used to automatically assign IP addresses and other network configuration details (such as subnet masks and default gateways) to devices on an enterprise-wide network.
* Why Not A (DNS): DNS resolves domain names to IP addresses but does not allocate IP addresses.
* Why Not B (Syslog): Syslog is used for logging system events, not IP address management.
* Why Not C (Telnet): Telnet is a protocol for remote access, not for IP allocation.
CompTIA A+ Exam Reference: Core 1 (220-1101), Section 2.6, DHCP concepts.

B). Correct the keystone:
A keystone correction adjusts the image shape when a projector is angled either up or down. When a projector is not positioned directly perpendicular to the screen, the image becomes distorted or offset. Correcting the keystone will resolve alignment issues, ensuring that the presentation matches the display.
Incorrect Options:
A). Adjust the color settings: This is used for improving color balance and has no impact on ghosting or mismatched images.
C). Increase the brightness levels: Brightness changes the visibility of the image but does not address ghosting or alignment.
D). Replace the monitor: Replacing the monitor is unnecessary unless there is hardware failure, which is not indicated here.
Key Takeaway: Keystone correction is essential to resolve alignment and distortion issues in projected images.
Reference: CompTIA A+ Core 1 Exam Objectives (220-1101), Domain 3.4 - Display troubleshooting.

When installing RAM into a server that will be used as a VM host, it is recommended to install ECC (Error-Correcting Code) RAM to help prevent errors that can cause virtual machines to crash. References:
https://www.servermonkey.com/blog/ecc-vs-non-ecc-ram-what-are-the-differences.html When installing RAM into a rackmount server that will be used as a VM host, it would be best to install ECC (Error Correcting Code) RAM which can detect and correct common types of data corruption.

A sandbox environment is an isolated testing environment where code can be written and tested without impacting other infrastructure. This provides a safe and controlled environment for experimentation and development. References: CompTIA A+ Certification Exam Core 2 Exam Objectives - 5.5 Compare and contrast common workstation security best practices