A buffer overflow is a vulnerability that occurs when an application writes more data to a memory buffer than it can hold, causing the excess data to overwrite adjacent memory locations. A register is a small storage area in the CPU that holds temporary data or instructions. An attacker can exploit a buffer overflow to overwrite a register with a malicious address that points to a shellcode, which is a piece of code that gives the attacker control over the system. By doing so, the attacker can bypass the normal execution flow of the application and execute arbitrary commands.
References: CompTIA Security+ SY0-701 Certification Study Guide, Chapter 2: Threats, Attacks, and Vulnerabilities, Section 2.3: Application Attacks, Page 76 1; Buffer Overflows - CompTIA Security+ SY0-
701 - 2.3 2

A site survey is the formal process used to determine the required number, placement, and configuration of wireless access points (APs). Security+ SY0-701 states that site surveys measure RF propagation, identify dead zones, account for building materials, detect interference sources, and evaluate coverage overlap. This information allows network engineers to deploy the fewest APs necessary while still ensuring full coverage.
Although heat maps (C) are generated as a result of a site survey, they are visualization tools-not the actual survey process. A signal locator (A) is not a standardized tool in wireless planning. WPA3 (B) is a wireless security protocol and has no impact on access point planning or coverage optimization.
A full site survey ensures optimal AP placement to balance coverage, performance, and cost-exactly the concern described in the scenario.
Thus, the correct answer is D: Site survey.

Automated vulnerability scanningis thefirst step in identifying system weaknesses. These scans systematically check for outdated software, misconfigurations, and known vulnerabilities in a network.
Penetration testing (B)is conducted after vulnerabilities are identified.
Threat hunting (C)focuses on detecting unknown threats, not listing vulnerabilities.
Reference:CompTIA Security+ SY0-701 Official Study Guide, Security Operations domain.