"Group Policy Objects (GPOs) are a feature of Microsoft Windows Active Directory that allow administrators to centrally manage and configure settings across multiple systems in an efficient manner. When a vulnerability such as SMBv1 (Server Message Block version 1) is identified onmultiple servers, GPOs can be used to disable this outdated and insecure protocol across all affected systems simultaneously. By creating a GPO to enforce a policy that disables SMBv1, the organization can ensure consistent remediation without manually configuring each server individually, making it the most efficient solution for domain-joined environments." Reference:CompTIA Security+ SY0-701 Study Guide, Domain 3.0: Implementation, Section: "Secure System Configuration" (GPOs are covered under centralized management tools for implementing security policies).
Explanation:SMBv1 is an outdated and vulnerable protocol that should be disabled to mitigate risks, such as exploitation by attacks like WannaCry. The question emphasizes efficiency across multiple servers. Option A (GPO) allows an organization to push a policy to disable SMBv1 across all servers in an Active Directory environment with minimal effort, making it the most efficient choice. Option B (ACL) refers to Access Control Lists, which manage permissions but aren't designed for protocol configuration. Option C (SFTP) is a secure file transfer protocol unrelated to SMBv1 remediation. Option D (DLP) focuses on data loss prevention, not protocol vulnerabilities. Thus, A is the correct and most efficient solution.